Set Up
Open the "Condition Zero" launcher and then click "Play" to launch the game with the regular settings. Then, load the "Deleted Scenes" campaign and select the mission you want to play by clicking on it. Click "OK" and wait for the map to load. Once in game, hold down the "~" key to bring up the console menu. Once the console pops up, type "sv_cheats 1" to enable cheating on the server. Then hit enter. Now, you can type in any cheat you want and it will take immediate effect in game.
Environment Cheats
"god" - God mode
"restart" - Restarts the map
"noclip" - No clipping mode
"notarget" - Enemies can't see you
"sv_gravity <#>" - Change the gravity; Deaf is 800
"mp_c4timer <#>" - Change the C4 timer; Deaf is 45
"mp_friendlyfire 0" - No friendly fire
"mp_startmoney <#>" -Change the starting money; Deaf is 800
"career_end_round" - Ends the round (you lose by default)
"career_restart " - Restarts the round
"mp_startmoney 16000" - Start with $16,000
"jointeam 6; jointeam 1" - Revive as a Terrorist
"jointeam 6; jointeam 2" - Revive as a Counter-Terrorist
"impulse 101" - Gives you $16,000
"quit" - Ends the game and quits "Condition Zero"
"disconnect" - Ends the game but doesn't quit "Condition Zero"
"mp_tkpunish 1" - Those who team kill will die automatically on the next round
"autobuy" - Automatically buys the best gun for your team. AK-47 for T and M4A1 for CT
"kill" - Suicide
AI Cheats
"bot_zombie 1" - Bots remain stationary
"bot_pistols_only" - Bots will only use pistols
"kick <bot´s name>" - Kick the bots off the server
"bot_sniper_only" - Bots only buy sniper rifles
"bot_difficulty <#>" - Set the bot´s difficulty level
"bot_knives_only 1" - Bots only use knives
"bot_kill" - Automatically kills all the AI bots on the map
Spawn Cheats
"weapon_ak47" - Spawns the name
"weapon_aug" - Spawns the name
"weapon_awp" - Spawns the name
"weapon_deagle" - Spawns the name
"weapon_famas" - Spawns the name
"weapon_fiveseven" - Spawns the name
"weapon_g3sg1" - Spawns the name
"weapon_glock18" - Spawns the name
"weapon_m3" - Spawns the name
"weapon_m4a1" - Spawns the name
"weapon_mac10" - Spawns the name
"weapon_mp5navy" - Spawns the name
"weapon_p228" - Spawns the name
"weapon_p90" - Spawns the name
"weapon_scout" - Spawns the name
"weapon_sg550" - Spawns the name
"weapon_sg552" - Spawns the name
"weapon_tmp" - Spawns the name
"weapon_ump45" - Spawns the name
"weapon_usp" - Spawns the name
"weapon_xm1014" - Spawns the name
"weapon_laws" - Spawns a rocket launcher
"weapon_m60" - Spawns an M60 machine gun
"ammo_generic" - Gives you full ammo of all weapons in your inventory