The Sonic the Hedgehog 2 AutoDemo is a Game Gear EPROM cartridge demonstrating the then-upcoming release of Sonic the Hedgehog 2, sent to several magazines worldwide for preview purposes. On July 14, 2014, Orengefox from Sonic Retro obtained a copy of the AutoDemo, and the ROM was released to the public in August. 'Sonic & Tails 2'), also simply known as Sonic Triple Trouble, is a platforming game in the Sonic the Hedgehog series for the Sega Game Gear. First released in November 1994, it was developed by Aspect and published by Sega. Unlike many Game Gear titles, an official Master System port was never released.
Input the following cheat codes into your Game Genie cartridge to initiate the corresponding effect. These codes also work on emulators with a cheat code/Game Genie functionality built in.
Some effects have 2 different codes. One works, depending on which version of the game you have. Try the first one first (the most common version), and if it doesn’t work use the second one.
SAST-DA1A / SATA-DATJ
Each Ring counts as 8 – Player 1
SATA-DAVW / SATA-DAW8
Each Ring counts as 8 – Player 2
JW3A-CA4J / JW3A-CA4Y
Infinite Lives – Player 1
JXGA-CA7G / JXGA-CA7W
Infinite Lives – Player 2
FVVT-CAE2
High Jump
EBVT-CAE2
Super Jump and float in water (turn off Cheat Cart to sink)
CBVT-CAE2
Mega Jump and float in water (turn off Cheat Cart to sink)
ABVT-CAE2
Nosebleed Jump
982T-CAF8 / 982T-CAGL
Stay invincible a bit longer after getting hit
ALTA-CA8N / ALTA-CA82
Stay invincible and invisible after getting hit. MUST have at least 1 ring (turn off Cheat Cart to reappear)
ALTA-CA9J / ALTA-CA9Y
Once invincible, stay invincible for the rest of the level
ATTT-CA4W / ATTT-CA58
Sonic doesn’t lose rings when hit
ATTT-CA5G / ATTT-CA6W
Tails doesn’t lose rings when hit
AH2T-CAH6 / AH2T-CAHN
Need only 1 ring to activate special stage at a starpost
SBJA-HAWJ / SBJA-HAV2
Sonic’s rings count as 8 in special stage only (doesn’t appear on counter but you do get them)
SBJA-HAWR / SBJA-HAV8
Tails’ rings count as 8 in special stage only (doesn’t appear on counter but you do get them)
ACZT-CACA / ACZT-CACN
Don’t need any Chaos Emeralds to become Super Sonic (does not work if you get an emerald)

AGZT-CACJ + K4ZT-CA9N / AGZT-CACY + K4ZT-CA92
Need only 1 ring to become Super Sonic. Must have all 7 Emeralds. Do not lose rings with time
2VAT-BCRN / 2VAT-BCRA
Start most levels with some rings
AY8A-AADN
Player 1 starts with 5 lives
2VAT-BCRT
Start levels with time already on your time counter
2VAT-BCRY
Zone title remains on-screen
SEST-D11A
Cannot receive rings, except from ring power-ups
ALTA-D53G
Jump directly to end of level
Strange Noises - 00D7F7:00 -Datel
Infinite Shields - 00D2D6:28 -Datel
Infinite Sneakers - 00DC0A:02 -Datel
Changes The Music - 00DC31:FF -Datel
Cheats For Sega Game Gear Sonic The Hedgehog 2.8
Infinite Lives - 00D240:09 -Viper187Infinite Time - 00D2D0:00 -Mez
Freezes The Time - 00D2D1:06 -Datel
Infinite Rings - 00D2A9:98 -Viper187
Invincibility - 00D209:01 -King of Chaos &/or Rid
Have All Chaos Emeralds - 00D279:06 -King of Chaos
Game Genie Codes:
Sonic The Hedgehog (U) (V1.0) [!]
Infinite lives - 007-01A-3BE -Galoob
Rings worth 2 points - 020-54A-E6E -Galoob
Cheats For Sega Game Gear Sonic The Hedgehog 2 Rom
Rings worth 3 points - 030-54A-E6E -GaloobRings worth 4 points - 040-54A-E6E -Galoob
Rings worth 5 points - 050-54A-E6E -Galoob
Rings worth 6 points - 060-54A-E6E -Galoob
Rings worth 7 points - 070-54A-E6E -Galoob
Rings worth 8 points - 080-54A-E6E -Galoob
Never lose rings - 3A0-21C-2A2 -Galoob
Stop timer - 003-F8C-3B7 -Galoob

Start with 5 lives - 053-7DE-E66 -Galoob
Start with 9 lives - 093-7DE-E66 -Galoob
Sonic The Hedgehog (U) (V1.1) [!]
Start on Green Hill Zone, part 2 - 003-8CE-5D4 + 013-88E-91A -Galoob
Start on Green Hill Zone, part 3 - 003-8CE-5D4 + 023-88E-91A -Galoob
Bridge, part 1 - 003-8CE-5D4 + Start on 033-88E-91A -Galoob
Bridge, part 2 - 003-8CE-5D4 + Start on 043-88E-91A -Galoob
Bridge, part 3 - 003-8CE-5D4 + Start on 053-88E-91A -Galoob
Jungle, part 1 - 003-8CE-5D4 + Start on 063-88E-91A -Galoob
Jungle, part 2 - 003-8CE-5D4 + Start on 073-88E-91A -Galoob
Jungle, part 3 - 003-8CE-5D4 + Start on 083-88E-91A -Galoob
Labyrinth part 1 - 003-8CE-5D4 + Start on 093-88E-91A -Galoob
Labyrinth part 2 - 003-8CE-5D4 + Start on 0A3-88E-91A -Galoob
Labyrinth part 3 - 003-8CE-5D4 + Start on 0B3-88E-91A -Galoob
Scrap Brain, part 1 - 003-8CE-5D4 + Start on 0C3-88E-91A -Galoob
Scrap Brain, part 2 - 003-8CE-5D4 + Start on 0D3-88E-91A -Galoob
Scrap Brain, part 3 - 003-8CE-5D4 + Start on 0E3-88E-91A -Galoob
Sky Base, part 1 - 003-8CE-5D4 + Start on 0F3-88E-91A -Galoob
Don't lose breath underwater - 2A2-86A-6E2 -Galoob