NEMESIS (Dark ORE) is a kickass supernatural horror role-playing game by Greg Stolze & co. NEMESIS uses the One Roll Engine (ORE), a dice pool system where matched die results determine success. It also uses Unknown Armies's Madness Meter without the Isolation track. Fuck yeah!
The book is bare bones without fluff or artwork. It can run any horror or survival setting regardless of the era. ORE is not entirely generic, but it is easily molded to different genres. Nemesis gives a good first impression of ORE's mechanics, but the flavor differs vastly between ORE incarnations. So to customize, a look at the other wonderful ORE games could be very helpful.
The book can be downloaded here for free: