Turn on cruise control
Press [Ctrl] + [Alt ] + X during game and type "cruise control".

Invincibility
Press [Ctrl] + [Alt ] + X during game and type "mr fabulous".

Display cows in scenario progress window
Press [Ctrl] + [Alt ] + X during game and type "cow frags".

Earth gravity
Press [Ctrl] + [Alt ] + X during game and type "earth".

Mars gravity
Press [Ctrl] + [Alt ] + X during game and type "mars".

Money $$$ Money
Buy a car. Enter "All tools and weapons" cheat then sell the car. (Its value will have appreciated.) Repeat as often as needed.

Moon gravity
Press [Ctrl] + [Alt ] + X during game and type "moon".

All tools and weapons
Press [Ctrl] + [Alt ] + X during game and type "beefcake beefcake".

Refill ammunition
Press [Ctrl] + [Alt ] + X during game and type "lock and load".

Repair damage
Press [Ctrl] + [Alt ] + X during game and type "im back".

$9,999,999
Press [Ctrl] + [Alt ] + X during game and type "sampo".

Jupiter gravity
Press [Ctrl] + [Alt ] + X during game and type "jupiter".