Dennis Katsonis (Borax Man) has made many levels in the past. Quake2'ites may be familiar with his Quake2 levels The Ulysses Project and Den's Palace. Orbital Fortitude is his latest Q2 release, and it is certainly a good piece of work.
It takes place among warehouses and labs, which have been built very well. Unfortunetly, research labs never really look that great architecturally, as they need to look realistic too. The layout was good, with much criss-crossing and backtracking.
Your mission is to track down a Data CD, which is usually a secondary objective in a level but here you are to travel all over the level trying to get to it. In the end you must defeat a Tank Commander to get it. The gameplay was good, fun and entertaining with many enemies. You start with 84, but it can grow alot depending how quickly you shut of the monster-maker machine. It is recommended that you take care of your ammunition as there isn't much (then put more in!) but I didn't find it much of a problem. I ended the level with about 30 rockets up my sleeve.
Overall this is one of the better levels released in quite a while, and certainly one of the more professional. It is good to see mappers still working with Quake2, rather than Quake3.