Press F11 to bring up the console, enter the codes and press Enter:
GHOST: invisibility
DISPLAY: see all characters
BINGO: ammunition
WINNER: win level
IMMUNITY: PC's invulnerable
BLOOD: see blood
WEAPON: receive a weapon
MATRIX: receive unlimited slow motion time
CHROMA: change the color of one PC on the fly
OPTIMIZE: optimize the custom memory manager
CESTLAZONE: show script zones
I AM THE WINNER: win the campaign
CAMPAIGN: load campaign values
PCSIGHT: enable PC view cone
LIGHT: show light zones
REPORT: finish campaign state report
LUKAS: knock out a PC
WIN: win this mission
WAKEUP: makes selected NPC wake up
STATUS PC: show the current status of all PC
STATUS SHADOW: receive Information about the sprite cache
STATUS HARDWARE: receive information about the hardware used
MOTION: see all motion obstacles & doors
MORPHEUS: knock out selected NPC
LOOSE: lose this mission
LEVEL TEXT: show all texts for the current level
HIGHLANDER2: adversaries become invulnerable
HIGHLANDER: PCs become invulnerable
HELP: show this help
PAMELA ANDERSON: Make the soldiers stupid in close combat
NUKE: kill all opponent in the level
NOISE: show ranges of walk noise of the PCs
FULLHOUSE: get all PCs ammunition for all actions
FREEZE: freeze all NPCs in the level
HADES: destroy selected NPC
GOLDENEYE: makes all PCs invisible for other characters
STATUS FRAMECACHE: receive information about the current sprite caching system
SPHERE: show the shadow polygon sphere
SHADOW: show the free shadow polygon
SAN PETRUS: makes all selected PC go to paradise
ROTER ALARM: alert all NPCs in the level
SEEKANDDESTROY: show all seek points
SARKOZY: securization of all memory allocation
RAILROAD: show railroads
PROJECTION: show all 3D-projection areas
FORGET: see the current state of the memory
FPS: shows the FPS rate
EZB: get money
EULER: see the graph of the pathfinder
ELEVATION: show bonds (yellow, red when crossed), character elevation
(blue) and character movement (white)
EINSTEIN: see all 3D-obstacles
DIES IRAE: divine intervention against enemies
COMPANIES: show the company numbers
CALL: call a PC's method
BIG BROTHER: show some actor infos
BABYLON: show all NPC remarks on screen
AWARE: show all NPCs
AI: shows AI information