edisoncarter has discovered the first ever valid cheat codes for Liberty City Stories:

Weapon Set 1 Brass knuckles, knife, molatov, 9mm, shotgun, tec-9, ak, flamethrower, sniper rifle Weapon Set 2 Katana, Grenade, Revolver, Sawn-off Shotgun, Uzi, M16, Rocket Launcher, Sniper Rifle w/ Laser Scope Weapon Set 3 Chainsaw, Grenade, Revovler, SMG, Combat Shotgun, Minigun, Sniper Money Cheat, Get $250000 Armor Cheat Health Cheat Raise Wanted Level Clear Wanted Level Unknown #1 Cars Drive On Water (New) White Traffic (New) Black Traffic (New) Unknown #2 (New) Unknown #3 (New) Random Ped Outfit (New)

(We advise that you do not save with these cheats activated, as there is a risk of file corruption.)

If you find out what the "unknown" cheats do, please let us know!

More will be revealed shortly. Keep checking back for updates.

Related Link: edisoncarter's site, GTAForums Topic