Just type in during gameplay:

allenradiation suit 
andrewbensoninvulnerability 
charlesjacobino clipping 
davidbrusgod mode 
deanhyersstrength 
digitalcafeall map 
joelkoenigsbootspork and "eat chex" 
kimhyersposition on map 
marybregiinvisibility 
mikekoenigsall ammo 
scottholmanall ammo and keys 
sherrilladditional map info 

Thanks to Revolution readers The Big Bad Marine and James M. McGuire!