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Sega Game Gear · cheat codes
Alien Syndrome cheats & codes
21 codes for Alien Syndrome on the Sega Game Gear, including Game Genie, Action Replay codes.
Alien Syndrome Game Genie codes
How to use: Galoob's Game Genie plugged in between the console and the cartridge. Type the codes in on its start-up screen, then press Start. In emulators, add them through the cheat menu and choose the Game Genie format if asked.
| Effect | Code |
|---|---|
| Start With 1 Life | 010-75F-E66 |
| Start With 5 Lives | 050-75F-E66 |
| Start With 9 Lives | 090-75F-E66 |
| Start With 500 Seconds | 058-39F-E66 |
| Start With 900 Seconds | 098-39F-E66 |
Alien Syndrome Action Replay codes
How to use: Datel's Action Replay sat between the console and the game. Enter codes on its menu before starting the game, or paste them into your emulator's cheat menu.
| Effect | Code |
|---|---|
| Infinite Lives | 00C0-1509 |
| Hostages Saved Modifier | 00CA-5DXX
00D6-5DXX |
Alien Syndrome Other codes
How to use: Additional codes collected by the community. Enter them through your emulator's cheat menu, choosing the format that matches your emulator.
| Effect | Code |
|---|---|
| Infinite Health | 00C0-1504 |
| Infinite Time | 00C1-13FF |
| Invulnerability | 00CA-5CFF |
| Invulnerability | 188-74B-6EA |
| Start with 1 life | 010-75F-E66 |
| Start with 5 lives | 050-75F-E66 |
| Start with 9 lives | 090-75F-E66 |
| Start with 500 sec. | 058-39F-E66 |
| Start with 900 sec. | 098-39F-E66 |
| Hostages Saved Modifier | 00CA-5D00
00D6-5D00 |
| Infinite Lives | 00C0-1509 |
| Infinite Lives | 007-5FB-19E |
| Configuration Menu | 01F-06D-D52 |
| Infinite Time | 3A4-14F-2A2 |
Using cheats today
Original cheat devices like the Game Genie, Action Replay and GameShark still turn up second-hand and work with original cartridges. Most modern emulators also have a built-in cheat menu that accepts these formats, so you can toggle codes on and off without extra hardware. Codes can differ between regional releases and revisions of a game; if one doesn't work, try the code list for another version.
Cheats can corrupt save files in rare cases, so back up your saves before experimenting.
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Cheat codes are from the libretro-database community collection, used under CC BY-SA 4.0; the code tables on this page are shared under the same license. Codes are provided as-is: some may not work on every version of the game.