Requirements: a computer capable of running Source engine games, Source SDK Base 2007. If installer doesn't work as supposed, uncompress it manually to your 'steam/steamapps/sourcemods/' folder.
Lot of work has been done to improved the learning curve, more coherent puzzles have been added.
A couple of serious bugs has been fixed: energy balls not able to hit bot instances and a player speed decrease after reload.
New features: stats tracking, gel doors, dual maze puzzle.
"Could not load library client". WTF?? Steam and all my files on it are fully updated. Why do many mods say that error? Is there a fix for all "Could not load library client" errors? Because regardless of what I change the Steam App ID to, it has that error. And I have an awesome computer with no viruses, Windows 7, 10GB of RAM, a 1.5 TeraByte hard drive, a Beats Audio sound card, and an NVIDIA GeForce GT520 video card. I just don't get it. :/