All weapons and extra items -
While playing a game, hold [Ctrl] and type "ALLWEAPONS".

Infinite ammunition and extra items -
While playing a game, hold [Ctrl] and type "AGRESSOR".

Repair pack -
While playing a game, hold [Ctrl] and type "HELPME".

More money -
While playing a game, hold [Ctrl] and type "MUCHMONEY".

Better acceleration -
While playing a game, hold [Ctrl] and type "BOOSTER".