Dying Light is a first-person, open world game set in a zombie apocalypse. The player character is able to free-run to get around the environment quickly.
A black-and-white, first-person horror game set in colonial America. It is the debut project of Blackpowder Games, an indie studio composed of ex-Monolith developers.
Beginning as a mod for ArmA II, the online zombie survival shooter DayZ is now a standalone game. It is currently in alpha, but is available as an Early Access game on Steam.
Absolutely horrifying game and a nod to Lovecraftian horror. Wish more similar games came out.