From the author's website:
The Next Step in Horror Roleplaying...
NEMESIS is a dark horror game — designed to emulate the works of H.P. Lovecraft, Stephen King, Ambrose Bierce, Brian Lumley, William Peter Blatty as well as settings such as Delta Green and the Gilchrist Trust — in a roleplaying game.
It is a new, faster, more elegant way of handling both combat (the One Roll Engine) and the sanity-rending effects of horror (the Madness Meter). It picks up where its predecessors left off; creating an incredibly rich, eminently expandable game structure to be built upon.
It can handle everything from a gritty Delta Green Operation into deepest Burma or an over-the-top brawl with the Ogdru Jihad in the world of Hellboy. The system is eminently scalable and customizable.