On the forest level I enter the truck (end screen) but I can't exit yet as it says 3/4 objecttives accomplished. I don't know what I'm missing. As far as I can tell all the enemies are dead (except for the guard in front of the truck) and all alarms are disabled. Also I,m using a cheat "give all". Could it be my innability to pick up the snooper rifle due to the cheat or am I missing something else?