Mansions of Madness is yet another Corey Konieczka/Fantasy Flight Games title, a combination that has produced at least a half a dozen other highly esteemed game titles.

MoM is a Cthulhu-themed dungeon crawl pitting a Keeper (like a GM) against the other players who cooperate as investigators wielding items, skills, and spells. In addition to these usual elements, another mechanic features actual in-game puzzles that you need to solve (other players may not give you hints).  Like other FFG titles, theme is heavy, combat is prevalent, and figures and artwork are lavishly detailed.