Project Legacy is a first person survival horror mod build on the GZDoom engine, which is a openGL sourceport for Doom. The aim of this mod is to create a first person survival experience that will function as a prototype for a full game.
I've got a lot of complaints from people saying the screenshots look too dark. Perhaps my monitor's gamma is just cranked up way high, but here's a version of the screenshot that I enhanced just a little bit using PhotoShop.
I can assure you that the game doesn't look too dark.