GameWorld

During play, press ~ to bring up the console and enter sv_cheats 1 and press Enter. Now do it again and enter restart. This will restart the mission with cheat mode enabled. Now during play, press ~ and enter the following:

god :
God mode
fly :
Fly mode
noclip :
No clipping
notarget :
Enemies can't see you
impulse 101 :
Most weapons
bot_kill :
Kill every bot
sv_restart :1
Restart round
restart :
Restart map with goals intact
maps * :
List map names
changelevel (map name) :
Change map; use above code
give (name) :
Spawn items; use names below

Item names:
weapon_aug
weapon_awp
weapon_deagle
weapon_elite
weapon_famas
weapon_fiveseven
weapon_g3sg1
weapon_glock18
weapon_m3
weapon_m4a1
weapon_mac10
weapon_mp5navy
weapon_p228
weapon_p90
weapon_scout
weapon_sg550
weapon_sg552
weapon_tmp
weapon_ump45
weapon_usp
weapon_xm1014