Difference between revisions of "Sonic the Hedgehog 2 (8-bit) AutoDemo/Hidden content"
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{{HiddenContent | {{HiddenContent | ||
| image1=Sonic2AutoDemo GG FreeMovement.png | | image1=Sonic2AutoDemo GG FreeMovement.png | ||
− | | desc=Changing byte | + | | desc=Changing byte {{hex|0x0064}} to {{hex|02}} will enable the ability to move around a level freely. Once enabled, hold {{1}} and press the D-Pad in any direction during gameplay to move [[Sonic the Hedgehog|Sonic]] around.{{ref|https://tcrf.net/Proto:Sonic_the_Hedgehog_2_(Sega_Master_System,_Game_Gear)#General_Differences}} |
}} | }} | ||
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{{HiddenContent | {{HiddenContent | ||
| image1=Sonic2AutoDemo GG TitleCard.png | | image1=Sonic2AutoDemo GG TitleCard.png | ||
− | | desc=Setting ROM address | + | | desc=Setting ROM address {{hex|0x2BA}} to {{hex|03}} will sometimes load an early title card on resets. It crashes to a black screen after two seconds.{{ref|{{LinkRetro|post=797151|title=Sonic Retro forum thread - (GG) Sonic 2 Auto Demo Prototype (1991-12-05) - Info & Download; post by You-Are-Pwned}}}} |
}} | }} | ||
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{{HiddenContent | {{HiddenContent | ||
| noimage=yes | | noimage=yes | ||
− | | desc=Similar to other games developed by [[sega:Aspect|Aspect]], the game's build date can be located at ROM address | + | | desc=Similar to other games developed by [[sega:Aspect|Aspect]], the game's build date can be located at ROM address {{hex|$C0}}: |
<pre>MS SONIC¥THE¥HEDGEHOG.2 Ver0.00 1991/12/05 Aspect Co.,Ltd</pre> | <pre>MS SONIC¥THE¥HEDGEHOG.2 Ver0.00 1991/12/05 Aspect Co.,Ltd</pre> | ||
}} | }} |
Revision as of 16:39, 26 September 2021
- Back to: Sonic the Hedgehog 2 (8-bit) AutoDemo.
Free movement
Changing byte 0x0064 to 02 will enable the ability to move around a level freely. Once enabled, hold and press the D-Pad in any direction during gameplay to move Sonic around.[1]
Unused content
Art
Art | Description |
---|---|
Sprites that depict Sonic laughing in a rather creepy manner. Purpose unknown. | |
A frame of Sonic's idle animation from the Master System version of Sonic 1, but altered to make him look happy. | |
An early skidding animation, which looks closer to those from the Mega Drive version. | |
Sonic can't die in this prototype, so this death sprite goes unused. It is identical to the final's early death sprite, taken from the Master System version of Sonic 1. | |
No monitors appear in any level, but graphics for them are loaded at the Sega/title screen. | |
These button sprites are located within the Under Ground Zone tileset, but aren't used in any Acts. | |
Under Ground Zone only has downward-facing spikes at this point, rendering these upward spikes unused. | |
There's nothing that can explode in the AutoDemo, so the explosion tiles that are located within the number/icon sprites are never seen in action. | |
Blocks can't be destroyed in the AutoDemo, leaving this fragment unused. | |
The trees seen in the final Sky High Zone and in some prerelease screenshots are present in the ROM, but not actually used at this point.[2] | |
The 16x16 font from the unused level title cards (see below). Only 8 of the 41 characters get used. |
Early title card
Setting ROM address 0x2BA to 03 will sometimes load an early title card on resets. It crashes to a black screen after two seconds.[3]
Build date
Similar to other games developed by Aspect, the game's build date can be located at ROM address $C0:
MS SONIC¥THE¥HEDGEHOG.2 Ver0.00 1991/12/05 Aspect Co.,Ltd
References
- ↑ The Cutting Room Floor: Proto:Sonic the Hedgehog 2 (Sega Master System, Game Gear)#General Differences
- ↑ [Sonic Retro forum thread - (GG) Sonic 2 Auto Demo Prototype (1991-12-05) - Info & Download; post by Master Emerald Sonic Retro forum thread - (GG) Sonic 2 Auto Demo Prototype (1991-12-05) - Info & Download; post by Master Emerald]
- ↑ [Sonic Retro forum thread - (GG) Sonic 2 Auto Demo Prototype (1991-12-05) - Info & Download; post by You-Are-Pwned Sonic Retro forum thread - (GG) Sonic 2 Auto Demo Prototype (1991-12-05) - Info & Download; post by You-Are-Pwned]
Sonic the Hedgehog 2 (8-bit) AutoDemo, prototype version of Sonic the Hedgehog 2 (8-bit) | |
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