Sonic the Hedgehog 2 (8-bit) AutoDemo/Hidden content
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- Back to: Sonic the Hedgehog 2 (8-bit) AutoDemo.
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.
|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.|
|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.
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
- ↑ https://tcrf.net/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, prerelease version of Sonic the Hedgehog 2 (8-bit)|
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