It maybe seems unfair that I'm rating a community Portal mod 90% when I just rated Manifold Garden 65% - but Revolution was never tedious. I never saw the solution to a puzzle and went "oh my god, what a pain in the ass this is going to be". I never wandered backward through an entire chapter looking for the entrance to another chapter that I somehow missed.
I played through the entire thing in 3 or 4 sessions, and it was fun.











