Total Mayhem

Total Mayhem cheat codes: 
When you're in the base screen, type CTL+SHIFT+CHEAT
to activate cheat mode. Then enter codes:

CTL+E - Give troops 1000 experience points at end of next mission
CTL+C - Give you 1000 credits
CTL+A - Make all weapons available for purchase
CTL+N - Skip to the next mission in the briefing room

When you're in missions, type CTL+SHIFT+CHEAT plus these
codes:

CTL+P - Place chars @ present cursor location
CTL+I - Make chars invincible (GOD MODE)
CTL+R - Restores health, shield, energy, and resurrect dead troops
CTL+M - Toggle monsters on/off