Survival games always have a few common features, even among the many disparate subgenres that have come to define this particular field of games. They are usually uncompromising, tasking the player with much to continue living, and usually also have players trying to keep on top of some resources vital to their... well, survival. This might be managing warmth in a game set within a colder clime, or managing sanity in a game rife with aberrant monsters.