Pretty big (looks like you'd need four or so for comfortable net play), but really well done. Some very nice features (polished crushers, e.g.). A little of everything...

Three maps, and a physics model that bumps up the aliens' skill without changing your abilities. Inspired by 20 Minutes of Hell, these are good for those times when you just need to waste some Pfhor...

Shapes, and sounds patch and a new physics model allows you to add a shotgun to any scenario. It replaces the pistol.

A really quick hack. A shapes patch that adds the faces of #marathon regulars to the walls, and a small map.