Another port of a Kendall Redburn M1 map. This one's square, with all flow in one direction (clockwise). Makes for dicey spanker shooting (you're often in narrow walkway spaces).

A three-level solo scenario where the bobs are your enemies, and everything else (well, almost everything) is on your side. (Comes with a physics model to make it work.) Well-planned levels take advantage of situations where bobs are superior, fighting-wise... pretty difficult, even on Normal.