Press [~] while playing and the console appears. Now type in one of
 the following codes:

 megaboss   God mode
 satan      God mode + comment

 gimme all  All weapons, ammo and items
 allit      All weapons, ammo and items

 Attention: if you use GIMME ALL or ALLIT you lose the ability to collect
 Quantum Receptor parts, which means you cannot finish the level !

 .prezes    Immortal
 .wp        All weapons
 .gotoXX    Jump into an other level XX
 aim on     Auto aiming ON
 aim off    Auto aiming OFF
 .did       Show frame rate
 .diz       Hide frame rate

  Level list (insert for XX):

 41 First Steps
 01 The Outer Citadel
 30 Through the Citadel
 10 The Middle Castle
 33 In the Middle of the Castle
 11 The Cathedral
 34 The Darker Cathedral
 12 The Cemetery
 13 The High Castle (Imperial Theme)
 14 The Castle Cathedral
 17 The Factory
 35 The Machine Park
 07 The Train Station
 08 U-Boat Bunker
 32 U-Boat Pen
 06 V2 Factory
 09 City Ruins
 24 The Duell
 15 The Time Machine
 02 The Future Time Machine
 28 Time Machine Facility
 05 Underground Channels
 31 The Sewers
 18 Kraftwerk
 03 Droid Factory
 19 Computing Center
 04 City in the Clouds
 16 The Spaceport
 29 Docking Bay 94
 23 The Flying Fortress

 Levels 20, 21, 25, 26, 27 and 42 lead to multiplayer levels, levels
 36 -40 are different versions of other levels.