Press Ctrl+Alt+Shift+C to enter a cheat code. Here is a list of supported codes (#N means an integer number).

prestige #N
Adds #N to prestige (can be negative)

core #N
Adds #N to core slots (can be negative)

aux #N
Adds #N to aux slots (can be negative)

sea #N
Adds #N to sea transports num (can be negative)

air #N
Adds #N to air transports (can be negative)

rail #N
Adds #N to rail transports (can be negative)

exp #N
Sets experience of the selected unit to #N

str #N
Sets strength of the selected unit to #N

ent #N
Sets entrenchment of the selected unit to #N

fuel #N
Sets fuel of the selected unit to #N

ammo #N
Sets ammo of the selected unit to #N

turns #N
Adds #N to scenario turn count. Can be negative.

weather #N
Sets current weather (0=clear, 1=overcase, 2=raining, 3=snowing)

ground #N
Sets ground state (0=dry, 1=muddy, 2=frozen)

fog of war
Shows enemy's units on the map (the opponent will not see our units until he enteres this code on his turn). Entering the code again disables this mode.

all eqp
Allows to buy any future equipment. Entering the code again disables this mode.

no zoc
Disables ZOC for our units. Entering the code again disables this mode.

uber units
Every attack of our units completely kills the opponent. Entering the code again disables this mode.

turbo units
All units move at speed 50. Entering the code again disables this mode.

force retreat
Any attack by our units forces the enemy to retreat. Entering the code again disables this mode.

endscn #N
Ends current scenario with outcome #N (in campaigns 0=decisive victory, 1=marginal victory, 2=loss).

chess
Makes all combats play exactly as they were predicted (unless rugged defense happens)

reform units
All killed units move to reserve with zero strength and can be reformed before the next scen