This is the entire set of Suicide maps created by Butch Massoni (through version 10). It includes the 49 original levels (tweaked a bit in some cases) as well as 5 new levels. There will be no more... marksmen (and women) need to check out Otis' Place.

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...

Butch said he was done with these, but he lied. Three more levels, one modified bungie and two original. Pistol Parlor gets some nice action with pistols as the only weapon...