There is more to it than a recruitment tool ...
From what I remember, the US Army needed to upgrade all of its simulators that it was using from the Quake II engine and they decided to use the Unreal 2 engine; and they decided to use a version of the simulations they were developing as a recruitment tool. From my (very limited) understanding, it has been a very successful tool because it gives people a more realistic view of what the Army is all about, which (often) weeds out the crazy people while encouraging the kind of people the Army is looking for.
What I have always wondered (since the release of the original version) is whether the Army gathers (and studies) statistics based on the matches. While the limitations in the system allow impossible strategies to be successful, for the most part it is based in reality and the success or failure of countless players probably works far better than any computer simulation at creating successful strategies.
