The Esoterrorists is, of course, Robin Laws’ investigation-centric* roleplaying game of horror, monsters, and the global conspiracy to stop both. The second edition expands on the first with regard to some game mechanics and a seriously expanded description of the campaign setting; I’ve been looking forward to the print version for some time. Not least because it’s very pretty.
God knows when I’m going to play it, though.
*GUMSHOE, to be precise. Robin Laws likes to think a lot about roleplaying games, in a non-pretentious way; he also wanted to work out a game system where clues and mysteries got the same attention that most games dedicate to combat. And this was the result.