The game will launch as part of Steam's Early Access program and will initially only have controller support. The final PC version will "of course" support mouse and keyboard.
Strain also teased an upcoming sandbox mode, saying, ""The goal of sandbox is to provide an unbounded experience, one with no victory condition that ends the game. The way we do that is to continue to have a world with finite resources, but find out 'how long can I stay alive.'"
Undead Labs plans to detail the sandbox mode sometime in the next week.