Entry location: During Gameplay, press [Enter]
To open the console, press [Enter] during gameplay at any time, but not during cut-scene conversations. You will see a cursor blinking. Enter the code and press [Enter] again. You will see that the code is accepted, when the char  appears next to the entered code. To make use of any code you have to activate the cheat mode, first. This is done by [Enter]cheats_2160[Enter] (note, that this is the only code where the [underline] char is used, not the [Space] bar!) and it is needed every time you start the game. Codes are saved in the console, so you might recall them by using the [arrow] keys at any time. Take into account to separate the codewords from the numerals by one [space] char.
cheats_2160 - Activates Cheat Mode (required once)
addmoney [x] - Adds resources, whereas [x] is the amount; e.g. addmoney 1000
researchall - Immediately gives you all researches
setexperiencelevel [x] - Appoints a certain experience level for marked units, whereas [x] is the level (1-8). Vehicles: let off pilots,enter code,let pilots board again.
setexperiencepoints [x] - Appoints experience points to marked units, whereas [x] is the amount of points. Vehicles: let off pilots,enter code,let pilots board again.
addexperiencepoints [x] - Adds experience points to marked units, whereas [x] is the amount of points. Vehicles: let off pilots,enter code,let pilots board again.
resetfog - Reveal map (still unable to see enemies)
heal - Heals marked units
kill - Kills marked units
gamerate [x] - Sets game speed, whereas [x] is the rate (1 - 100)
time [x] - Sets time of day, whereas [x] is a numeral: 1-65 = night, 66-200 = day
quit - Quits the current game