In many survival-themed games, the ecosystem doesn't change much. Predators are always out to kill you, while prey just wants to mind its own business. However, you'll have to be much more thoughtful with the just-released Rain World. Videocult's long-in-the-making PS4 and Windows action adventure (its crowdfunding campaign started in 2014) has you fighting for life in a wilderness where animals learn from their interactions with you. Seemingly docile critters may start treating you as a threat if you play too aggressively, while hostile beasts might back off if you figure out what they need. Some enemies have their own predators to worry about, so you're not the only threat.