i played this game once, before, finished it several times, however since then i rebooted my computer.. and i've just put the game back on (well over a year later...) but i remember having some sort of cheat/trainer or something so i had unlimited health, i NEVER had to worry about dying, i never had trouble with marsh refinery before, i used to run straight at the guy on the machine gun and shoot him in the face while i was infront of him an he was still shooting.. anyone know what i had? i cant really remember weather it was a cheat or a trainer or what.. but im posotive i had something..

It sounds like 'godmode' in the 'svcklead patch', which is still available to download, if you search the forums for it I believe.