Press ~ in game to access the console and enter the following codes:

All god modes: godall
God mode for player: god
Full ammunition: fullammo
Walk through objects: togglecollision
Animate hostage: hp <0 or 1>
Deactivate IO devices: deactivateiodevice
Flight mode: ghost
Disable flight: walk
God mode for hostages: godhostage 1
Disable god mode (hostages: godhostage 2
Disable morality: disablemorality
Disarm all bombs: disarmbombs
Game modes: sgi
Game does not end: toggleunlimitedpractice
God mode for team: godteam
God mode for terrorists: godterro
Hostage threat information: togglehostagethreat
Invisible to terrorists: playerinvisible
Kill all Rainbow operatives: killrainbow
Kill all terrorists: neutralizeterro
Next hostage animation: hna
Play demo: demoplay
Stop recording: stopdemo
Previous hostage animation: hpa
Quit game: quit
Record demo: demorec
Remove all hostages: killhostage
Remove all NPCs: killthemall
Remove all terrorists: killterro
Remove opponents: killpawns
Rescue all hostages: rescutehostage
Reset hostage threat: resetthreat
Resets all cheats: resetmeall
See all terrorists on map: rendspot
Set hostage position (0 = standing, 1 = kneeling, 2 = prone, 3 = fetal, 4 = crouched, 5 = random): sethpos (0-5)
Show all map routes: routeall
Show field of vision: showfov
Show terrorist/hostage routes: route
Show weapon direction: gundirection