Deep beneath the surface of this remote island, at the end of a mile-long rail tunnel, lies this laboratory devoted to discovering the secrets of the slime. Sure, it's green, it's slimy, it smells bad -- but obviously there must be more to it than that! (People can get research grants for anything! Governments doubly so!)
This is the post-disaster variant of Lab17: SlimeLab. A severe earthquake has caused major structural damage to one side of this subterranean complex, destroying the slime storage tank and flooding part of the building (and the huge crack in the supposedly "unbreakable" window, allowing the flooding slime outside to pour in, didn't help matters!) Aftershocks continue to plague the lab...
[Warning/apology: I got a little carried away with the scope of the various Lab17 levels, and eventually gave up all hope of keeping the r_speeds respectably low (mostly because I'm spoiled by having good machines to run them on.) Consequently this level is a bit of a hog, and it won't play properly under HL's software display driver. It runs fine on a 2GHz Celeron with OpenGL. You have been warned!]
(11-24-2019) Edit: download link fixed by The Mad Carrot