During play, press Backspace and type !throw me a frickin bone here. Now press Backspace and enter the following codes:

!captain scarlet		God mode   
!full monty			God mode and all items   
!its dark 			Hide all enemy troops on mini-map  
!italian job			Big explosion around Sarge   
!cut to the chase 		Win scenario  
!the meek  			Lose scenario
!door  				Teleport Sarge
!rate me			Display frame rate   
!let me down			Sarge's health to almost 0   
!halloween			Enemy troops are zombies   
!disco is dead			Put out Sarge's fire   
!haunt haunt haunt!		10 Explosives  
!harsh language 		20 Fly Swatters 
!heavenly glory			3 AirStrikes 
!one time...			3 Baseballs 
!spiny norman			3 HammerMines   
!this one goes to eleven	3 Napalm Strikes   
!johnny ricco			3 Paratroopers 
!peep show			3 Recons 
!scotty				3 SpaceMen Reinforcements   
!henry				30 Insecticide Spray   
!sprinkles			30 Mines   
!i woke up this morning 	9 Blue Disguise 
!incognito  			9 Grey Disguise
!no sunblock 			9 Tan Disguise   
!oh behave			Freeze enemies
!mojo				Unfreeze enemies 

Hints

Thanks to Revolution readers Kevin Smith, Lian savellon, Zameer Yusof and Phoenix Gamma!