Easy Money
At the Research and Manufacture screen, select any workshop and assign a job. You will lose the cost of one of the items. Now enter the assign screen again. You will get the cost refunded. Back out of the Assign screen, then re-enter it to get more cash.

Activate Cheat Mode
To activate the cheat mode in X-Com: Apocalypse Tactical, hold down Alt and type TAC CHEAT. The message bar will tell you if it worked. If not, press Alt and any key other than T. Then try again. To enter one of the following Cheat Codes, hold down the Alt key while pressing any of the following letters: To exit Cheat mode, hit Alt-Esc.

Decreases musical intensity
Activate the cheat mode then hit Alt and G

Toggle hidden terrain
Activate the cheat mode then hit Alt and H

Toggle god mode
Activate the cheat mode then hit Alt and I

Kill all hostile units
Activate the cheat mode then hit Alt and K

Show frame counter
Activate the cheat mode then hit Alt and R

Toggle training mode
Activate the cheat mode then hit Alt and T

Toggle hidden units
Activate the cheat mode then hit Alt and V

Increase musical intensity
Activate the cheat mode then hit Alt and F

Toggle weightlessness
Activate the cheat mode then hit Alt and W