Grand Theft Auto: Chinatown Wars Command codes

Weapon Set 3
Enter this code at any time during single player (not on a pause menu) to get weapon set 3:

R, Up, Y, Down, Left, R, Y, Right

Weapon Set 3 includes these weapons with maximum ammo:

Proximity Mines, Chainsaw, Revolver, Flamethrower, Carbine, SMG, Dual-barrel