Phantasy Star Classic
Sega Master System · cheat codes
Ys I cheats & codes
6 codes for Ys I on the Sega Master System, including Action Replay codes.
Ys I 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 Health | 00C1-8E0F
00C2-220F |
| Maximum HP/HP Is Infinite | 00C2-22FF |
| Maximum Str | 00C2-23FF |
| Maximum Def | 00C2-24FF |
| Maximum Gold/Gold Is Infinite | 00C2-25FF
00C2-26FF |
| Maximum Experience | 00C2-27FF
00C2-28FF |
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.
Ys I walkthroughs & guides
More Master System games with cheats
Back to Ys I: is it worth playing?
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.