While life sims have you managing one or multiple lives in various settings, survival sims are more focused: they involve trying to stay alive in a potentially inhospitable environment. Scavenging for tools and equipment, managing thirst and hunger, and tending to injuries are all key features in a survival sim. In addition to the environment itself, dangers can come in the form of other people, animals or creatures.
I Am Alive (PC)
Details on Ubisoft's PC version of I Am Alive, a survival simulation game set in a post-apocalyptic world.
Organ Trail: The Director's Cut
Details on the zombie-themed twist on the classic computer game, The Oregon Trail.
Details on Arma 2's DayZ mod, a survival simulation in an open world populated by zombie-like humans and deadly player-controlled bandits.