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Difference between revisions of "Sonic the Hedgehog 2 (16-bit)/Text Editing"

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[[SCHG:Sonic 2|Sonic 2 guide]] | [[Sonic_Community_Hacking_Guide|Main SCHG page]]
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__NOTOC__
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{{SCHG S2}}
 
One of the most useful things to change in the game is the text. Though, there are many different formats for the many different types of text in the game. The known formats are listed here.
 
One of the most useful things to change in the game is the text. Though, there are many different formats for the many different types of text in the game. The known formats are listed here.
  
−
==Two-Player Mode Text==
+
==Two-Player Mode text==
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2 Player Mode Text
+
The text starts at byte_874A in Xenowhirl's disassembly. It uses a non-ASCII format, but thanks to [[AS]]' macro capabilities can be edited in the disassembly as plain text.
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{|border="1"
 
−
!Offset||Text
 
−
|-
 
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|$874B-8756
 
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|Emerald Hill
 
−
|-
 
−
|$8759-8763
 
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|Mystic Cave
 
−
|-
 
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|$8765-8770
 
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|Casino Night
 
−
|-
 
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|$8772-877E
 
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|Special Stage
 
−
|-
 
−
|$8783-8789
 
−
|Special
 
−
|-
 
−
|$878D-8790
 
−
|Zone
 
−
|-
 
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|$8793-8797
 
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|Stage
 
−
|-
 
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|$8799-87A1
 
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|Game over
 
−
|-
 
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|$87A3-87AB
 
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|Time over
 
−
|-
 
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|$87AD-87B3
 
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|No game
 
−
|-
 
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|$87B5-87B8
 
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|Tied
 
−
|-
 
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|$87BB-81BC
 
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|1P
 
−
|-
 
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|$87BF-87C0
 
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|2P
 
−
|}
 
−
 
 
  
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Options
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==Options text==
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{|border="1"
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The text starts at byte_97CA in Xenowhirl's disassembly, and once again can be edited as plain text. The in-game format for each character is as follows:
−
!Offset||Text
+
{| class="prettytable" style="width: auto;"
−
|-
 
−
|$97CB-97DB
 
−
|* Player select *
 
−
|-
 
−
|$97DD-97EB
 
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|Sonic and Miles
 
−
|-
 
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|$97ED-97FB
 
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|Sonic and Tails
 
−
|-
 
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|$97FD-980B
 
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|Sonic alone
 
−
|-
 
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|$980D-981B
 
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|Miles alone
 
−
|-
 
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|$981D-982B
 
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|Tails alone
 
−
|-
 
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|$982D-983D
 
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|* Vs mode items *
 
−
|-
 
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|$983F-984D
 
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|All kinds items
 
−
|-
 
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|$984F-985B
 
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|Teleport only
 
−
|-
 
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|$985F-986F
 
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|* Sound test*
 
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|}
 
−
 
 
−
 
 
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To properly modify the text, you will need to become familiar with the character set. Listed here is the entire character set that you can use.
 
−
{|border="1" align="center"
 
 
|-
 
|-
 
|width="100"|00 - Space
 
|width="100"|00 - Space
Line 144: Line 66:
 
|}
 
|}
  
−
==Level Select Text==
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==Level Select text==
 +
The level select uses a [[plane map]] for the foreground and background graphics. The plane map for the text is located at MapEng_LevSel in Xenowhirl's disassembly, and is [[Enigma compression|Enigma-compressed]]. It is 40x28 tiles wide, with each word in it representing one 8x8 tile, arranged row-by-row.
  
−
009AEB-??????<br/>
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The highlighting uses a different system, based on the array at byte_96EE. There are four bytes per level select entry. The first byte is the row offset into the plane map for the level name text, the second byte is the column offset for the same text multiplied by 2. The third byte is the row offset into the plane map for the act number text. If this is 0, no highlighting is performed for this text. The fourth byte is the column offset for the act number text multiplied by 2.
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009B44 - ARZ<br/>
 
−
009B58 - WFZ<br/>
 
−
009BEF - OOZ<br/>
 
  
−
The format for level select text is very different. This is because it is mapped. This can be very confusing because it uses a very odd format—10 bits for each character. So, the easiest way to modify it is to take 5 bytes and convert them into bits. Then take the bits and separate them into 4 sets of 10 bits. So, if I have "C1 E0 B8 32 07", then I'd convert that into bits. The Windows calculator will work this feature just fine (although if you don't have 2000 or later, you'll have to do two calculations, as only [[double-word]] length is supported on the older versions of the Windows calculator). Then break up the large line of bits into sets. So, "C1 E0 B8 32 07" would become this.
+
The level select icons are even simpler, based on an array at byte_96D8 in the 2007 xenowhirl disassembly. One byte per level select entry. Use the table below to choose an icon:
  
−
1100000111 (A)<br/>
+
{| class="prettytable" style="width: auto;"
−
1000001011 (Q)<br/>
+
|-
−
1000001100 (U)<br/>
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|00
−
1000000111 (A)<br/>
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|EHZ
−
 
+
|-
−
This is the confusing part. You'll have to 'shift' the bits over to the left by 2. So, take a look at A and Q (1100000111 1000001011). Shifting over to the left by 2 would convert these into 0000011110 00001011(10). The extra 10 on the end of the Q comes from the first two bits of the U. So, the values above come out to be this.
+
|01
−
 
+
|MTZ
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0000011110 (A)<br/>
+
|-
−
0000101110 (Q)<br/>
+
|02
−
0000110010 (U)<br/>
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|HTZ
−
00000111(10) (A)<br/>
+
|-
−
 
+
|03
−
These values represent the character number of each listing in the games VRAM. So, like 0000011110 (1E in hex form) for example is the letter A found in the VRAM. You can also use the chart at the top of this page for a full listing of the major characters.
+
|HPZ
 +
|-
 +
|04
 +
|OOZ
 +
|-
 +
|05
 +
|MCZ
 +
|-
 +
|06
 +
|CNZ
 +
|-
 +
|07
 +
|CPZ
 +
|-
 +
|08
 +
|ARZ
 +
|-
 +
|09
 +
|SCZ
 +
|-
 +
|0A
 +
|WFZ
 +
|-
 +
|0B
 +
|DEZ
 +
|-
 +
|0C
 +
|Special Stage
 +
|-
 +
|0D
 +
|X
 +
|-
 +
|0E
 +
|Sound Test
 +
|-
 +
|}
  
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Death Egg and Hill Top aren't editable yet though. Nobody has figured out why, and I haven't really taken the time to look at them. For now, Death Egg and Hill Top will have to remain the way they are on the level select.
+
As for the horizontal selection array. That one is just about as easy to edit as the icons. Each entry is a single byte representing the next text selection if left or right is pressed for that entry.  The array itself is at byte_95A2 in the 2007 xenowhirl disassembly.
  
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© 1992 SEGA
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==© 1992 SEGA text==
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For editing the "© 1992 SEGA" text string on the title screen, you must use a different character set. Here are the instructions.
+
The "© 1992 SEGA Text" on the title screen is located at CopyrightText in Xenowhirl's disassembly, and uses a different format. Each word represents one character. The word values corresponding to each character are:
−
 
+
{| class="prettytable" style="width: auto;"
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003E80 - © 1992 SEGA
 
−
 
 
−
FORMAT:
 
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#1 #2
 
−
 
 
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1+2 - Sprite selection in VRAM.
 
−
 
 
−
Every time you get up to 08 00 in a sprite selection, it wraps from the beginning of the VRAM, but with a different palette. Here are the standard sprite numbers for each character.
 
−
 
 
−
{|border="1" align="center"
 
 
|-
 
|-
 
|width="100"|00 00 - Space
 
|width="100"|00 00 - Space
Line 239: Line 184:
 
|}
 
|}
  
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==Credits/Intro Text==
+
==Credits/Intro text==
−
Now that we have gotten all the basic text editing information out of the way, we can now learn how to edit the larger font text. This uses X and Y coordinates to place the character on the screen rather than just using a fixed font. Here are the instructions for editing the intro screen and the credits.
+
The credits and intro texts use X and Y coordinates to place the character on the screen rather than just using a fixed font. While the intro text uses only one position and pointer array, located at off_B2B0, the credits text uses a separate position and pointer array for each screen, and the pointers to these arrays are located at off_B2CA.
  
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003A30 - Pointer to screen 1 information (intro)<br/>
+
Each entry in the position and pointer array consists of one longword followed by one word. The longword is an absolute pointer to the actual text data. The word is the VRAM location, inside the plane A table, to write the characters to.
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00A016 - Pointer to data pointers for each screen (credits)<br/>
 
−
<br/>
 
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00B2B0 - Screen 1 information (intro)<br/>
 
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00B2CA - Data pointers for each screen (credits)<br/>
 
−
00B322 - Screen 1 information (credits)<br/>
 
  
−
This is the format for laying pieces out onto the screen. This will not edit the actual text though.
+
The text data is preceded by a single byte which is of the format PCCVH000 in case of the credits text, and PCCVH101 in case of the intro text, with P being the high priority flag, CC being the palette index to use, and V and H being the vertical and horizontal flip flags, respectively. The actual text uses one byte per 8x8 tile. However, most of the characters are 16 pixels wide and therefore take up two bytes. The text can be edited as ASCII inside the disassembly, and the actual format in-game is as follows for the intro text:
−
 
+
{| class="prettytable" style="width: auto;"
−
FORMAT:
 
−
#1 #2 #3 #4 #5 #6
 
−
 
 
−
1+2+3+4 - 32-bit address for text location<br/>
 
−
5 - Every time this value changes every 2 values, it will move on the Y axis 3 characters (24 pixels)<br/>
 
−
6 - Every time this value changes every 2 values, it will move on the X axis ½ characters (8 pixels). Every 80 changes in value will move on the Y axis 1 character (8 pixels).<br/>
 
−
 
 
−
For text, it works by placing 8x8 tiles together to make up the text.<br/>
 
−
 
 
−
===Credits Text Format===
 
−
{|border="1" align="center"
 
 
|-
 
|-
 
|width="100"|00 - Space
 
|width="100"|00 - Space
Line 309: Line 238:
 
|}
 
|}
  
−
 
+
and as follows for the credits text:
−
===Intro Text Format===
+
{| class="prettytable" style="width: auto;"
−
 
 
−
{|border="1" align="center"
 
 
|-
 
|-
−
|width="100"|00 & 01 - Space
+
|width="100"|00 or 01 - Space
 
|width="100"|02 & 03 - A
 
|width="100"|02 & 03 - A
 
|width="100"|04 & 05 - B
 
|width="100"|04 & 05 - B
Line 360: Line 287:
 
|}
 
|}
  
 +
An FF signifies the end of the string.
  
−
Look in the games VRAM (patterns) to get the full listing of each character.
+
==Title Card text==
−
 
+
The title card text loads all common patterns (red stripe, act numbers, letters E, N, O and Z (spells ZONE), etc) into VRAM. The other letter art loaded, however, differs from zone to zone, and the letters loaded for each zone are governed by the offset table at byte_15820. This table has one byte per level, that byte being an offset into word_15832, which contains the data for letters to load for each level. For each entry in word_15832, the first byte specifies the 8x8 ID of the starting tile, and the second byte is the number of 8x8s to load. The 8x8 ID for each letter is as follows:
−
On text strings, FF is a separator that tells it to stop reading further. After FF, the next byte tells what palette info to use. This goes in 32's for each palette. This goes in 1's for change in tile set (move down the list of tiles every 256 tiles per every change in value). Use 00, 20, 40, and 60 for the credits and use 05, 25, 45, and 65 for the intro.
+
{| class="prettytable" style="width: auto;"
−
 
 
−
 
−
 
 
−
==Title Card Text==
 
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{|border="1"
 
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!Offset||Text String
 
−
|-
 
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|$15832-1583F
 
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|(E)m(e)rald( )Hi(ll)
 
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|-
 
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|$15842-1584F
 
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|M(e)tr(o)p(o)lis
 
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|-
 
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|$15852-1585B
 
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|Hil(l )T(o)p
 
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|-
 
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|$1585E-1586B
 
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|Hid(den )Palac(e)
 
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|-
 
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|$1586E-15875
 
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|(O)il( O)c(e)a(n)
 
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|-
 
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|$15878-15887
 
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|Mystic( )Cav(e)
 
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|-
 
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|$1588A-15897
 
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|Casi(no )(N)ight
 
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|-
 
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|$1589A-158A9
 
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|Ch(e)mical( )Pla(n)t
 
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|-
 
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|$158AC-158B9
 
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|Aquatic( )Rui(n)
 
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|-
 
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|$158BC-158C7
 
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|Sky( )Chas(e)
 
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|-
 
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|$158CA-158D7
 
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|Wi(n)g( )F(o)rtr(e)s(s)
 
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|-
 
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|$158DA-158E3
 
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|D(e)ath( )(E)gg
 
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|}
 
−
 
 
−
 
 
−
The above locations hold information that tells the game what sprites to load for the specific level splash text. Below is a list of all the characters you can choose from and what their values are.
 
−
 
 
−
{|border="1" align="center"
 
 
|-
 
|-
 
|width="100"|00 - A
 
|width="100"|00 - A
Line 441: Line 321:
 
|56 - Y
 
|56 - Y
 
|5A - .
 
|5A - .
−
|FF FF - End of string
+
|
 
|}
 
|}
  
−
Now down to business. First off, you need to understand that E, N, O, Z (spells Zone), and space are not with this text editing section. They are in another section in which will be discussed after these notes. It is important that you understand the format. Here is how it works.
+
An FF FF signifies the end of the entry. Since this table only governs the letters to load, repeated letters are mentioned only once, and the letters E, N, O and Z are not loaded at all, since they are part of the main title card patterns.
  
−
FORMAT:<br/>
+
The actual level name display is handled by the title card mappings, located at Obj34_MapUnc_147BA. Each frame from 0 to $10 in these mappings corresponds to the title card of the level with the same ID:
−
#1 #2<br/>
+
{| class="prettytable" style="width:auto;"
−
 
+
! Level ID !! Level Name
−
1 - Character<br/>
+
|-
−
2 - Length that the character is drawn<br/>
+
| 00 || Emerald Hill Zone
−
 
+
|-
−
Characters that are present more that once only show up once. This is because this stuff is only the info to tell what loads at startup and doesn't need to load the same thing twice since its already there. Here is a list of where all the strings are located.
+
| 04 || Metropolis Zone
−
 
+
|-
−
Now, you will want to edit the actual strings and not just the sprites that load. So, here are the notes you need.
+
| 05 || Metropolis Zone Act 3
−
 
+
|-
−
FORMAT:<br/>
+
| 06 || Wing Fortress Zone
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#1 #2 #3 #4 #5 #6 #7 #8<br/>
+
|-
−
 
+
| 07 || Hill Top Zone
−
1 - Y position of the character every pixel<br/>
+
|-
−
2 - Length (going by the character size bytes gives a corrected length)<br/>
+
| 08 || Hidden Palace Zone
−
3 - Graphics every 256 8x8 sprites<br/>
+
|-
−
4 - Graphics every 8x8 sprite<br/>
+
| 0A || Oil Ocean Zone
−
5 - ???<br/>
+
|-
−
6 - ???<br/>
+
| 0B || Mystic Cave Zone
−
7 - ???<br/>
+
|-
−
8 - X position of the character every pixel<br/>
+
| 0C || Casino Night Zone
−
 
+
|-
−
Now, remember that there is a 2 byte header for each string that tells how many characters to read. Now you will probably want the location that allows you to change what string is used for each level. So, here it is.
+
| 0D || Chemical Plant Zone
−
 
+
|-
−
0147BA - 2 bytes for location after this location for each level<br/>
+
| 0E || Death Egg Zone
−
 
+
|-
−
Here is how each string is listed.
+
| 0F || Aquatic Ruin Zone
−
 
+
|-
−
Level 00<br/>
+
| 10 || Sky Chase Zone
−
Level 01<br/>
+
|}
−
Level 02<br/>
 
−
Level 03<br/>
 
−
Level 04<br/>
 
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Level 05<br/>
 
−
Level 06<br/>
 
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Level 07<br/>
 
−
Level 08<br/>
 
−
Level 09<br/>
 
−
Level 0A<br/>
 
−
Level 0B<br/>
 
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Level 0C<br/>
 
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Level 0D<br/>
 
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Level 0E<br/>
 
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Level 0F<br/>
 
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Level 10<br/>
 
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"Zone"<br/>
 
−
1<br/>
 
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2<br/>
 
−
3<br/>
 
−
"Sonic The Hedgehog"<br/>
 
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Red splash screen panel edges<br/>
 
  
−
Now, you need to know what value to give each character. Here are the values.
+
These mappings can be edited in [[SonMapEd]] or [[Flex 2]] by taking a VRAM dump while the title card for a particular level is on-screen, loading this dump as the art file, and then editing the appropriate frame in the mappings.
  
−
80 - E<br/>
 
−
84 - N<br/>
 
−
88 - O<br/>
 
−
8C - Z<br/>
 
−
DE - Character list (see "Level Splash Startup" above)
 
  
−
Splash Screen Panel: 014C32
+
==References==
 +
<references />
  
 
{{SCHGuides}}
 
{{SCHGuides}}
−
[[Category:Sonic Community Hacking Guide]]
 

Latest revision as of 16:37, 24 March 2020


Sonic Community Hacking Guide
Sonic the Hedgehog 2 (16-bit)
Art
Objects
Levels
Text
Music
RAM
Miscellaneous

One of the most useful things to change in the game is the text. Though, there are many different formats for the many different types of text in the game. The known formats are listed here.

Two-Player Mode text

The text starts at byte_874A in Xenowhirl's disassembly. It uses a non-ASCII format, but thanks to AS' macro capabilities can be edited in the disassembly as plain text.

Options text

The text starts at byte_97CA in Xenowhirl's disassembly, and once again can be edited as plain text. The in-game format for each character is as follows:

00 - Space 10 - 0 11 - 1 12 - 2
13 - 3 14 - 4 15 - 5 16 - 6
17 - 7 18 - 8 19 - 9 1A - *
1B - © 1C - : 1D - . 1E - A
1F - B 20 - C 21 - D 22 - E
23 - F 24 - G 25 - H 26 - I
27 - J 28 - K 29 - L 2A - M
2B - N 2C - O 2D - P 2E - Q
2F - R 30 - S 31 - T 32 - U
33 - V 34 - W 35 - X 36 - Y
37 - Z 0E - Start a new text line 10 - Start a new selection box

Level Select text

The level select uses a plane map for the foreground and background graphics. The plane map for the text is located at MapEng_LevSel in Xenowhirl's disassembly, and is Enigma-compressed. It is 40x28 tiles wide, with each word in it representing one 8x8 tile, arranged row-by-row.

The highlighting uses a different system, based on the array at byte_96EE. There are four bytes per level select entry. The first byte is the row offset into the plane map for the level name text, the second byte is the column offset for the same text multiplied by 2. The third byte is the row offset into the plane map for the act number text. If this is 0, no highlighting is performed for this text. The fourth byte is the column offset for the act number text multiplied by 2.

The level select icons are even simpler, based on an array at byte_96D8 in the 2007 xenowhirl disassembly. One byte per level select entry. Use the table below to choose an icon:

00 EHZ
01 MTZ
02 HTZ
03 HPZ
04 OOZ
05 MCZ
06 CNZ
07 CPZ
08 ARZ
09 SCZ
0A WFZ
0B DEZ
0C Special Stage
0D X
0E Sound Test

As for the horizontal selection array. That one is just about as easy to edit as the icons. Each entry is a single byte representing the next text selection if left or right is pressed for that entry. The array itself is at byte_95A2 in the 2007 xenowhirl disassembly.

© 1992 SEGA text

The "© 1992 SEGA Text" on the title screen is located at CopyrightText in Xenowhirl's disassembly, and uses a different format. Each word represents one character. The word values corresponding to each character are:

00 00 - Space 06 80 - 0 06 81 - 1 06 82 - 2
06 83 - 3 06 84 - 4 06 85 - 5 06 86 - 6
06 87 - 7 06 88 - 8 06 89 - 9 06 8A - *
06 8B - © 06 8C - : 06 8D - . 06 8E - A
06 8F - B 06 90 - C 06 91 - D 06 92 - E
06 93 - F 06 94 - G 06 95 - H 06 96 - I
06 97 - J 06 98 - K 06 99 - L 06 9A - M
06 9B - N 06 9C - O 06 9D - P 06 9E - Q
06 9F - R 06 A0 - S 06 A1 - T 06 A2 - U
06 A3 - V 06 A4 - W 06 A5 - X 06 A6 - Y
06 A7 - Z

Credits/Intro text

The credits and intro texts use X and Y coordinates to place the character on the screen rather than just using a fixed font. While the intro text uses only one position and pointer array, located at off_B2B0, the credits text uses a separate position and pointer array for each screen, and the pointers to these arrays are located at off_B2CA.

Each entry in the position and pointer array consists of one longword followed by one word. The longword is an absolute pointer to the actual text data. The word is the VRAM location, inside the plane A table, to write the characters to.

The text data is preceded by a single byte which is of the format PCCVH000 in case of the credits text, and PCCVH101 in case of the intro text, with P being the high priority flag, CC being the palette index to use, and V and H being the vertical and horizontal flip flags, respectively. The actual text uses one byte per 8x8 tile. However, most of the characters are 16 pixels wide and therefore take up two bytes. The text can be edited as ASCII inside the disassembly, and the actual format in-game is as follows for the intro text:

00 - Space 01 & 02 - A 03 & 04 - B 05 & 06 - C
07 & 08 - D 09 & 0A - E 0B & 0C - F 0D & 0E - G
0F & 10 - H 11 - I 12 & 13 - J 14 & 15 - K
16 & 17 - L 18 & 19 - M 1A & 1B - N 1C & 1D - O
1E & 1F - P 20 & 21 - Q 22 & 23 - R 24 & 25 - S
26 & 27 - T 28 & 29 - U 2A & 2B - V 2C & 2D - W
2E & 2F - X 30 & 31 - Y 32 & 33 - Z 34 & 35 - 2
36 - ( 37 - ) 38 - " 39 - .
3A - © 3B & 3C - 1 3D & 3E - 9 3F & 40 - :

and as follows for the credits text:

00 or 01 - Space 02 & 03 - A 04 & 05 - B 06 & 07 - C
08 & 09 - D 0A & 0B - E 0C & 0D - F 0E & 0F - G
10 & 11 - H 12 - I 13 & 14 - J 15 & 16 - K
17 & 18 - L 19 & 1A - M 1B & 1C - N 1D & 1E - O
1F & 20 - P 21 & 22 - Q 23 & 24 - R 25 & 26 - S
27 & 28 - T 29 & 2A - U 2B & 2C - V 2D & 2E - W
2F & 30 - X 31 & 32 - Y 33 & 34 - Z 35 & 36 - 2
37 - ( 38 - ) 39 - " 3A - .
3B - © 3C & 3D - 1 3E & 3F - 9 40 & 41 - :

An FF signifies the end of the string.

Title Card text

The title card text loads all common patterns (red stripe, act numbers, letters E, N, O and Z (spells ZONE), etc) into VRAM. The other letter art loaded, however, differs from zone to zone, and the letters loaded for each zone are governed by the offset table at byte_15820. This table has one byte per level, that byte being an offset into word_15832, which contains the data for letters to load for each level. For each entry in word_15832, the first byte specifies the 8x8 ID of the starting tile, and the second byte is the number of 8x8s to load. The 8x8 ID for each letter is as follows:

00 - A 04 - B 08 - C 0C - D
10 - F 14 - G 18 - H 1C - I
1E - J 22 - K 26 - L 2A - M
30 - P 34 - Q 38 - R 3C - S
40 - T 44 - U 48 - V 4C - W
52 - X 56 - Y 5A - .

An FF FF signifies the end of the entry. Since this table only governs the letters to load, repeated letters are mentioned only once, and the letters E, N, O and Z are not loaded at all, since they are part of the main title card patterns.

The actual level name display is handled by the title card mappings, located at Obj34_MapUnc_147BA. Each frame from 0 to $10 in these mappings corresponds to the title card of the level with the same ID:

Level ID Level Name
00 Emerald Hill Zone
04 Metropolis Zone
05 Metropolis Zone Act 3
06 Wing Fortress Zone
07 Hill Top Zone
08 Hidden Palace Zone
0A Oil Ocean Zone
0B Mystic Cave Zone
0C Casino Night Zone
0D Chemical Plant Zone
0E Death Egg Zone
0F Aquatic Ruin Zone
10 Sky Chase Zone

These mappings can be edited in SonMapEd or Flex 2 by taking a VRAM dump while the title card for a particular level is on-screen, loading this dump as the art file, and then editing the appropriate frame in the mappings.


References


Sonic Community Hacking Guide
General
SonED2 Manual | Subroutine Equivalency List
Game-Specific
Sonic the Hedgehog (16-bit) | Sonic the Hedgehog (8-bit) | Sonic CD (prototype 510) | Sonic CD | Sonic CD (PC) | Sonic CD (2011) | Sonic 2 (Simon Wai prototype) | Sonic 2 (16-bit) | Sonic 2 (Master System) | Sonic 3 | Sonic 3 & Knuckles | Chaotix | Sonic Jam | Sonic Jam 6 | Sonic Adventure | Sonic Adventure DX: Director's Cut | Sonic Adventure DX: PC | Sonic Adventure (2010) | Sonic Adventure 2 | Sonic Adventure 2: Battle | Sonic Adventure 2 (PC) | Sonic Heroes | Sonic Riders | Sonic the Hedgehog (2006) | Sonic & Sega All-Stars Racing | Sonic Unleashed (Xbox 360/PS3) | Sonic Colours | Sonic Generations | Sonic Forces
Technical information
Sonic Eraser | Sonic 2 (Nick Arcade prototype) | Sonic CD (prototype; 1992-12-04) | Dr. Robotnik's Mean Bean Machine | Sonic Triple Trouble | Tails Adventures | Sonic Crackers | Sonic 3D: Flickies' Island | Sonic & Knuckles Collection | Sonic R | Sonic Shuffle | Sonic Advance | Sonic Advance 3 | Sonic Battle | Shadow the Hedgehog | Sonic Rush | Sonic Classic Collection | Sonic Free Riders | Sonic Lost World
Legacy Guides
The Nemesis Hacking Guides The Esrael Hacking Guides
ROM: Sonic 1 | Sonic 2 | Sonic 2 Beta | Sonic 3

Savestate: Sonic 1 | Sonic 2 Beta/Final | Sonic 3

Sonic 1 (English / Portuguese) | Sonic 2 Beta (English / Portuguese) | Sonic 2 and Knuckles (English / Portuguese)
Move to Sega Retro
Number Systems (or scrap) | Assembly Hacking Guide | 68000 Instruction Set | 68000 ASM-to-Hex Code Reference | SMPS Music Hacking Guide | Mega Drive technical information
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