The first two levels of a rather large scenario. (All the levels are there, but only the first two have polygons in them... well, the third has a pair so that you can teleport in, but...) Generally pretty difficult, but more for techical reasons than anything else. The central shaft on the first level (by which most intra-level travel occurs) is a bit tough to get the hang of. Once you've figured it out (and ignored the bad textures inside), it's pretty cool... and there's a nice trap on level two.

A three level solo scenario. You're a prisoner, and your job is to escape, rescue Robert Blake, and get out. If you can finish this level on TC, consider yourself a true vidmaster. There are an absurd number of aliens here... and very limited recharging capabilities (unless I missed 'em all).

An extremely well-done 8-level solo scenario. (Well, the count's a little suspect-there are a couple of levels that probably shouldn't be counted (they're added for story continuity, but except for weapons refreshment, they don't have much on 'em), and one net level that's simply the last level, redone for netplay-but the important part is that it's a full scenario.) The story revolves around the battle for a water supply plant... and has a non-standard ending. The chapter art is inspired. Highly recommended.

Wow, I'm not really sure what to say about this one. It's WAY too hard, so much so that in order to see all of it, I cheated. Maybe it's possible to get through it without cheating, but I don't think I've got that kind of time... OTOH, it's a really nicely designed level, with lots of new things every time you go through an area. There are a few misaligned textures, but nothing to yell about, and sounds are used well. Just when you think you're stuck, you come across that overlooked switch, or that hidden uplinK chip... and another door opens.