Original theme, terrible execution.
It isn't much to look at in terms of refined construction/detail and lighting, but it works suitably well given the novelty and feels somewhat fresh. Finally an oil rig map in Quake! Gameplay is typical Tronyn carnage with many monsters and many weapons/items. Quite bearable on hard, fun.
Unfortunately, the performance is horrible. I should applaud you for managing to make it run this shit even on modern hardware (admittedly with an older temp video card atm). High wpoly was to be expected, but how up to 55k epoly?! Is it because all monsters are drawn at all time due to the almost non-existing visblocking? At any rate, the poor frame rate ruined the maps for me.
I noticed a few unnecessary (obvious) bugs, too. In sludge1, around 20 items fall out of the level. This is so stupid - how long have you been into mapping now, and still such beginner's oversights....
Also, apparently the platform only moves once (should have been wait or toggle). I missed it and eventually had to noclip.
Sludge2's performance would have benefitted greatly from compiling it with nowatervis. Though I have to admit the underwater stuff does look pretty cool with a subtle wateralpha. Too bad I only noticed this afterwards. The shape of the outside (sky-) box further increases the polycount unnecessarily - a simple four-wall box would have been better, and, considering the non-visblocking water surface, the foundations of the oil rig should have been made not to touch the floor.
Finally, some demos of my firstrun: http://www.quaketastic.com/upload/files/demos/sludge_negke.zip