If you don't know what rust is, it's a dayz like zombie survival where you survive against other players, wildlife, and of course zombies. Rust has been in alpha for a while but as of today it has been released on steam for only 20$. It's still in development but since there aren't that many servers for rust it could be a new way to get new players into the community.
Also forgot to add that it's being developed by Gary Newman.