Was about to point that out :-).
Anyway
Natural Selection is a veeeeeeeery cool RTS (sort of) mod for HalfLife. Aliens versus Marines and stuff. It has a VERY nifty commander mode in which you have a topdown view of the map with all your little (real life) Marines running around. It's just sooooo cool =). Try it, you'll get addicted :-b.
Unbelieveable that stuff like this still can be squeezed out of the HalfLife engine.