To activate the cheat mode press [Return], type in:
Oh grosser Thomas, erlФse mich!
Press [Return] again. Now you can use the following codes:

Code Result 
[STRG] + [ALT] + [V] Full Map 
[STRG] + [ALT] + [Z] Fast Build 
[STRG] + [ALT] + [E] 1000 Energy 
[STRG] + [ALT] + [X] 1000 Xenit 

Note: To type " Ф " press: [ALT] + [1] + [4] + [8].