Sonic Mega Collection/Hidden content

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Select Sonic 1 revision

By default, Sonic Mega Collection will load REV01 of Sonic the Hedgehog with the "spike bug" fix, but two other revisions can be accessed by entering button codes when displaying the Sonic 1 info screen:

To play REV00 (described as "US"), press .
To play REV01 WITHOUT the "spike bug" fix (described as "JP"), press .
To replay the version by default (described as "JP2"), start the game then return to the menu, or press .

In PAL versions of Sonic Mega Collection, 60Hz mode must be enabled in order to input the above codes (hold on startup or, if playing on a Wii, select 60Hz in the Wii settings). Otherwise, it will play the standard US/PAL version.

Unused content

Early menu

A very early game select menu in Japanese exists on the disc, left over from an earlier stage of development than the 2002-08-15 prototype. The original 3D Studio Max file of the menu is present in the same folder, as well as a breakdown of all the menu's textures in PNG format. The menu translates to:

GAMES
Sonic the Hedgehog
Sonic the Hedgehog 2
Dr. Robotnik's Mean Bean Machine
Ristar the Shooting Star
Flicky
Monster Lair
Vectorman

The rest of the menu is a series of A's in hiragana (あ). Vectorman would later be included in Sonic Gems Collection, but not Monster Lair.

Sonic CD remnants

When hacking into Sonic Mega Collection, one can find the entire European Sonic the Hedgehog CD manual. Not only that, but a preview version has Sonic CD on the list of games to pick. On the same preview version, in the movies section, you can find "Sonic the Hedgehog Movie Part 1" and "Sonic the Hedgehog Movie Part 2", likely meaning that the Sonic OVA was once in Sonic Mega Collection.

A Sonic Mega Collection prototype released by drx actually has all of this stuff included, however the movies and the Sonic CD game are nonfunctional.

Sample videos

Three videos exist within the game's data and are all copyrighted to CRI Middleware Co. Ltd., which helped Sega with AV-related things for their GameCube titles. While it is likely Sega was testing the Sofdec player and simply didn't take these files out, the movies and songs take up roughly 20% of the data...and even then, there is still empty space on the disc. This space could have easily been used for more games...or even Sonic CD, which allegedly couldn't be included partly because of "space limitations".

sample.sfd

sample.sfd is a test video for CRI's Sofdec video compression technique for developers. If opened by FFPlay or a similar player that can play Sofdec/ADX files, the unused song is played as well (see Music below).

loopbgv.sfd

loopbgv.sfd is nothing more than a CG water rippling effect somewhat like the Sonic Team logo animation from Sonic Adventure. It lacks any sort of sound and only lasts 12 seconds. The purpose of this clip, aside from showing off Sofdec's capabilities, is currently unknown.

smpinter.sfd

smpinter.sfd is a 30-second clip of San Francisco. This might be from CRI, since they do have offices in San Francisco, It is suspected to be a test clip from the Dreamcast development kit.

Audio

Audio	Description
	music24a.adx — A three-and-a-half minute track used for a video intended to demonstrate the capabilities of the Sofdec codec (see above).
	demosound.bin — The music for the 2P Battle menu from Sonic Adventure 2: Battle, likely meant to test the ADX music format.

Demo leftovers

Present in the "demo" folder on the disc are .tpl files that have graphics for a demo, all in Japanese.

Art	Description
	The title screen for the demo, which uses the layout of the prototype's title screen.
	Title screen text informing the user to press .
	Early Game Select graphics for the demo.
	Various title screens used for the Game Select screen and menu control information. Some of the title screens are dimmed to indicate they were not available to play.
	A screen that would be displayed when the demo ends.

Cheat device codes

These are cheat codes that can only be used with game enhancer devices. Support for these codes is available in most emulators.

Action Replay

Official codes, PAL version

Code	Effect	Reference
`9X45-8AYJ-T3A07 J5E5-A3QD-F41C5`	Master Code (must be on).	^[1]
`RFN8-YDUE-XTEG0 E51J-BMR6-PB357`	Have Blue Sphere open.	^[1]
`RKM8-BT5U-2VPWJ 8AZG-TEHP-9C5QQ`	Have Knuckles in Sonic 2 open.	^[1]
`FRVM-KFZU-46XDP JQEC-UT6N-GVKNP`	Have Sonic 3 & Knuckles open.	^[1]
`X92D-VKEP-AVGWP Y0X4-N7EC-2BB32`	Have Flicky open.	^[1]
`98EZ-5EEM-WYG8R UM6F-6Y3B-Q9RAR`	Have Ristar open.	^[1]
`NPX6-64D0-VEMBH ZWYB-XYRM-H85NP`	Sonic 1: Infinite lives.	^[1]
`NADH-99V3-9Z3B6 5X97-UXZN-4DAWT`	Sonic 1: Always have 99 rings.	^[1]
`UD65-UW6R-DAXDA 1V7B-43PV-X561J`	Sonic 1: Freeze timer.	^[1]
`6ATT-XWVF-XVYH2 VTQW-1TF0-A3E29`	Sonic 1: Invincible.	^[1]
`CYDK-VP10-TDXC0 EE3J-W5Z5-DDTVE`	Sonic 2: Infinite lives.	^[1]
`AB15-NTJX-VAHCH CFBU-0Q9M-GRN0V`	Sonic 2: Always have 99 rings.	^[1]
`029Z-M9ZN-MKPPK J0RG-UMQT-DWBQF`	Sonic 2: Freeze timer.	^[1]
`FAMQ-CAEE-2MMP0 ZY4T-V3JR-7V407`	Sonic 2: Invincible.	^[1]
`76TD-18QB-AB81E 2456-QJDP-FW7FC`	Sonic 3: Infinite lives.	^[1]
`DYFT-3GPP-230D1 88DF-F7HW-ZRA4U`	Sonic 3: Always have 99 rings.	^[1]
`JY6N-FNEQ-U27ND 57FT-Y1B6-Y0UDM GRKZ-Y1UU-TRQGF`	Sonic 3: Infinite air - Sonic and Tails.	^[1]
`5HBP-UFVP-8TW20 KPVD-YKNR-A79ZB`	Sonic 3: Freeze timer.	^[1]
`MFT0-KJWC-4RPBV 39TK-CEN2-ZQFJM`	Sonic 3: Invincible Sonic.	^[1]
`JQJ9-Q45W-6AJWT 6FZW-HDEQ-88YX5`	Sonic 3: Invincible Tails.	^[1]
`EJCB-NDN0-1WXAP CNK2-UYCW-5U68N`	Sonic & Knuckles: Always have 99 rings.	^[1]
`9P25-E2VY-52XG3 TCAV-ZVPZ-G6ENG`	Sonic & Knuckles: Freeze timer.	^[1]
`6TN1-NZ5M-NEBK2 4NK7-3PPR-GGY2U`	Sonic & Knuckles: Infinite lives.	^[1]
`0THB-GVK6-YA89D C154-BDXX-T5FKH`	Knuckles in Sonic 2: Infinite lives.	^[1]
`TH66-HK5M-VNRZM G5Q7-UFCR-HBM1B`	Knuckles in Sonic 2: Always have 99 rings.	^[1]
`DK9D-QHNB-PJ17F BBF7-Q5RP-JQX6Y`	Knuckles in Sonic 2: Freeze timer.	^[1]
`YRP3-KVCP-YH155 Y0J6-XFDH-BUND7`	Knuckles in Sonic 2: Invincible.	^[1]
`2UU4-EM95-UE33P QPDJ-AVPK-FAQQM`	Sonic 3 & Knuckles: Infinite lives.	^[1]
`J000-Y6VZ-9CCGM D3CX-EHU6-K15KV`	Sonic 3 & Knuckles: Always have 99 rings.	^[1]
`RKBH-9PK5-QQYT7 HJ8G-CBCB-AJEDQ`	Sonic 3 & Knuckles: Freeze timer.	^[1]
`DGJY-4QX2-210X6 DXHE-8PTP-WR9AZ`	Sonic 3D: Flickies' Island: Infinite lives.	^[1]
`M35U-G2J5-YY6P3 9B5T-HKUX-1T6F0 K6RC-727K-P6U1R`	Sonic 3D: Flickies' Island: Always have 99 rings.	^[1]
`EECM-UCV9-172ZD 9ZVY-UUC0-KEDK4`	Sonic Spinball: Infinite balls.	^[1]
`GURG-A2AD-663ZC X5MP-TDAE-9BM5U`	Sonic Spinball: Have 3 Emeralds/Boss Room Open.	^[1]
`FHB3-0JC9-5NJWW CUKR-5Z7U-F9BHJ`	Ristar: Infinite health.	^[1]