[Death from Above]

For all this idiots here its not wrong to cheat in SP your only playing by yoursef. And to answer your question yes cheats are enabled in version 1.1 in SP only they are disabled in MP. Anyways if you want the cheats here they are:

To enable cheat mode, start the game with the following parameters:

+set ui_console 1 +set cheats 1 +set thereisnomonkey 1

Then, while in the single-player game, press "~" to bring up the console and type any of the codes listed below:

dog - God Mode
fullheal - Full Health
wuss - All Weapons & Ammo
noclip - No Clipping (Go Through Walls)
notarget - Show Game Version
fullheald - Heal player
listinventory - List of the player's inventory
tele x y z - Teleport to location
coord - Prints out current location and angles
health - set current health
kill - Kills the player

That should answer your question. Oh yeah cheats do suck in MP but who cares if you are in SP if you already beat it fare and square.