Press ` to bring up the console. Type in sv_cheats 1, then input a cheat from below.
Or you can go to Options, Keyboard, Advanced, then Enable Developer's Console to input the following codes:
|God||Enter God Mode|
|sv_gravity X||Change the value of X, change gravity (only for admins)|
|notarget||Enemies will not see you|
|impulse 101||Get $16,000 cash, Ammo and Armor|
|impulse 102||Shoot meatballs|
||Jump to map|
|exec speedhack||press + you will go fast, if press - will go normal|
Thanks to Revolution readers aasi, Bigfoot, noob, sausage, and Jelly!