Sin
Bring up the console by pressing the ~ key. Then enter these cheats:-
/health 999 - full health
/wuss - all weapons
/superfuuzz - god mode
/nocollision - no clipping
/no clipping - no clipping
/wallflower - enemy won't shoot at you
/give thrallgun - secret weapon
/spawn heligun - gives chopper gun with unlimited ammo
/spawn magnum - gives the magnum
/spawn shotgun - gives the shotgun
/spawn assaultrifle - givves assauultrifle
/spawn rocketlauncher - gives rocketlauncher
/spawn sniperrifle - gives sniperrifle
/spawn rockets - gives rockets
/spawn bluecard - gives blue identcard
/spawn orangecard - gives orange identcard
/spanw yellowcard - gives yellow identcard
/spawn greencard - gives green identcard
/spawn keyring - gives small key
/spaen moneybag - gives bag from bank robbery
/spawn evidence - gives papers with evidence
/spawn coin - gives a coin
/spawn health - gives a healthpack
/spawn cookies - gives a pack of cookies
/spawn lensflare - weird light effect
/spawn silencer - gives a silencer for a standard gun
/spawn chemsuit - gives protection suit
/map intro - over freeport city bank
/map bank - freeport city bank
/map abandon - abandoned freeport
/map csite - construction site
/map subway - abandoned subway
/map chem1 - sintek chemical labs
/map chem2 - sintek chemical plant
/map whouse - sintek warehouse
/map whouse2 - sintek warehouse part 2
/mapbiomecha - biomech factory
/map biomechb - biomech factory part 2
/map silo - missile factory
/map sewera - freeport sewers
/mapaq1 - freeport adueduct
/map sewerb - freeport sewers part 2
/map dam - freeport city dam
/map wworks - freeport water works
/map wworks - freeport water works part 2
/map oilrig - intek oilrig
/map geo2 - geothermal subtraction
/map geo - geothermal plant
/map uwpass1 - underwater passage
/map uwpass2 - underwater passage
/map docks1 - hidden docks
/map docks - submarinal cargo 5
/map jungle - jungle pass
/map jungle2 - jungles pass part 2
/map gorge - mountian gorge
/map area57 - area 57
/map biomass - biomass reclamation center
/map xeno1 - xenomorphic laboratory
/map xeno2 - xenomorphic labatory part2
/map mansion1 - estate sinclair
/map mansion2 - estate sinclair part 2
/map phoenix -munt phoenix
/mapthrall - thrall master
/map training - training
/map training1 - training
/map training2 - training
/map training3 - training
/map training4 - training
/map paradox - bonus level