Enter the Hacking engine in the game, then enter "CHEAT.EXE". Now, use the following codes:
Infinite health: 7F4DF451
Infinite focus: 69E5D9E4
Maximum firepower: 0034AFFF
Infinite ammunition: 1DDF2556
Fast focus restore: FFF0020A
Bonus test level: 13D2C77F
Sparks' Construct in training mode: 13D2C77F
Enemies cannot hear you: 4516DF45
Enemies cannot see you: FFFFFFF1
Taxi Driving: 312MF451
Multi-player fighting: D5C55D1E
Faster logos: 7867F443