Cheat Codes
While playing, press [ENTER], then type any of the following codes:

Code: Result:
SELFDEFENCEAGAINSTFRESHFRUITS God Mode for Units
MOTORHEAD One Hit Kills
BICYCLEREPAIRMAN Free Repair
SPOTTHEBRAINCELL Add 1000 XP to Unit
MONEYSONG Add 1000 Prestige to Unit
DIRTYHUNGARIANPHRASEBOOK Win Mission
MRHILTER Call for Support
THEFUNNIESTJOKEINTHEWORLD Unknown Effect

Invulnerability
The only god mode (or invulnerability) cheat that works is:

SelfDefenceAgainstFreshFruit

Note the difference: 'fruit' is singular, no 's'. That works for invulernabililty. Could not get 'motorhead' (supposedly Instant Kill) to work, only 'TheSpanishInquisition' seems to work for Instant Kill mode.

A lot of the cheats you have listed on your site for this game do not work, at least, not in the N. American version that I just bought. So you might want to change these. I think they were just copied from other sites, and I am letting them know too.

Seriously, I have been testing them all over the last hour and a half, they don't work, except a couple that I have mentioned. There are a few, like 'BicycleRepairman', that were acknowledged by the game when I typed them in, but seemed to have no effect. The only ones I didn't test were the points-related cheats. Oh yeah, the instant win scenario cheat-

'DirtyHungarianPhrasebook'