PS1 | Submitted by GamesRadarGet All Weapons
HOLD down the R1 button and enter the following code during the game. Left, Left, Square, Circle, R2, Right, Triangle, L2. If entered correctly you will hear a screeching sound.
Next enable the cheat by going to the options menu and select the cheat menu
PC | Submitted by GamesRadarCheats
Hold [Left Shift] and then type the following codes.
hhroqtat Get All Weapons
terhsrer Level Skip
cchaserq Repairs Damage
herhsore Finish Current Level
qheroest Finish All Levels
cheatseq All cheats Enabled
PC | Submitted by GamesRadarMedieval Level
On the Medieval level you can crash into the church at high speed to find a power up
On the Medieval level you can get a 3x cargo hold if you search underwater to the left of the base