Special Features option:
Press select to go into inventory screen and highlight the Timex selection. Hold L1 + L2 + R1 + R2 + Down + Circle and press Triangle.

All weapons, unlimited ammo & health packages:
Press select to go into inventory screen and highlight the Timex selection. Hold L1 + L2 + R1 + R2 + Up and press Triangle.

All items:
Press select to go into inventory screen and highlight the Timex selection. Hold L1 + L2 + R1 + R2 + Down and press Triangle.

Level select:
At main menu enter these codes:
Russian Base: Hold L2 + Up, press X
Black Isle: Hold L1 + Up, press X
Tower Block: Hold R1 + Up, press X

Special Features option (beta ver.):
Press select to go into inventory screen and highlight the Small Medkit. Hold L1 + L2 + R1 + R2 + Down + Circle and press Triangle.

All weapons, unlimited ammo & health packages (beta ver.):
Press select to go into inventory screen and highlight the Small Medkit. Hold L1 + L2 + R1 + R2 + Up.

All items (beta ver.):
Press select to go into inventory screen and highlight the Large Medkit. Hold L1 + L2 + R1 + R2 + Down.

Show FMV's (beta ver.):
Go to the main menu and press R2 + Select.

Level select (beta ver.):
First enter the main menu screen and highlight New Game. Then:

Hold L2 and press X - Black Isle
Hold L1 and press X - Russian Base
Hold R1 and press X - Tower Block