When playing any level with traps, constantly keep half of your view on the ground so you can see the little half invisible ropes.
Oh and sometimes it helps to follow your point man no matter how slow he is.
Submitted by Taylor Hackel
If you are having trouble on the "Outpost" mission because you don't have any time after the 2nd radio transmission (the first being the one at beginning of mission), don't answer the 2nd transmission until after you kill all 3 mortar teams. Then answer your radio and proceed to the outpost (follow the dirt path where the 3rd mortar team is).
Submitted by ryan_16hockey