Set in the unstable lower caverns of the Black Mesa Research Facility, the Sublevels were critical to maintaining the rest of the facility, until the Incident occurred. All exits were sealed off by frantic workers, who soon realized their serious mistake -- they were trapped. With low food and few supplies the occupants began to fight with eachother...

There is more than meets the eye in this map...

*Tested primarily on an Intel 2ghz Celeron, 256 RAM (actually 512 but one of the sticks was knocked loose somehow) with an nVidia GeForce 4 MX.

**UPDATE
Being rather new to DM mapping I never paid much attention to R_Speeds, WPolys and EPolys.. However, I ran Sublevels with r_speeds 1 and noticed WPolys were in the 1000s so I deleted the neat little dusty light beam effect around the lights, which significantly dropped WPolys.

A small arena, I Don't Know started out as a simple staircase. That's all. From there on I had no idea what I was doing other than building random stuff, hence the name: I Don't Know.

A variant of Toxicity I may release either instead or alongside the original. Set in a steel mill, there is obviously an abundance of hot things -- molten slag, furnaces, steam, and the like.
Since it's based on an already mostly-complete level, the layout has already been established. In fact, it's basically the same as Toxicity, but with completely different rooms and textures.

More updates will be posted as changes are made.