A single level solo scenario. You wake up in a strange room, with a magnum that shoots pfhor bolts instead of bullets... flow is good, the level is hard, and generally, completion is possible.

7 maps, mostly small (except for the last one, which is quite large). Author says they've been tested with 1 and 2 people... it's doubtful larger groups would have enough weapons and ammo. (In most of the maps, larger groups would trip over each other.) Comes with a bunch of bonus physics models.

A 5 map collection (well, 6, but one is not accessible, either in network or solo mode, and crashes Forge pretty hard). Mostly small, with pretty plain lighting/sounds Nice for pairs (except for Trax Re, which can fit more).

Replacements for the existing Alien landscapes (night and day) in both Infinity and M2. More realistic... and this version contains Hamish Sanderson's modifications to make the 8-bit versions look almost as good as the 16-bit versions.

A mostly enclosed, tight-hallwayed map. (There's open space, too, but the dominant type is closed-in.) A few minor glitches, but mainly pretty nice mapmaking. Flow is good-there are multiple exits from most areas, and you won't get hung up on edges too much. Effort has been put into lighting, which (because of the mostly small spaces) shouldn't affect framerates. (The map could use a bit of sound, though...) Comes in two flavors-heavy on the weapons and ammo, for large groups, and lighter on both, for smaller groups.

A huge arena surrounded by rising hallways. With big groups, this might be fun, but smaller groups would have a hard time getting close enough to kill. There's a switch in the central pillar which I don't understand at all... all it seems to do is make the upper hallways vulnerable from below. Since only those in the upper hallways can flip the switch, it seems, well... pointless. (I suppose it also makes the area around the hill targetable from above... but there is much more freedom of movement down below, so it's more dangerous to those in the passageways.)

A four level solo scenario. Mostly well-built, with nice architecture, and decent gameplay. Play would be better, I think, if it weren't quite so predictable.

A small mazelike map, with an embedded physics model that keeps you on your toes. (It's designed to be played solo-the SPN stands for SIngle Player Network.) You get one magnum (and, if you kill the infrequent vacubob, a fusion pistol), and your job is to kill as many bobs as you can. (There is no end.) Good for target practice... the bodies really pile up. Enough recharge canisters appear that you can keep going as long as you want to.

A six-level, action-packed solo scenario. This was released (and announced on alt.games.marathon) last fall, but there wasn't any active archiving going on at the time.