I have a 7 Days to Die server that ZeroXephon, my GF and I play on if anyone else wants to join us. 7 Days to Die is a zombie survival horror sandbox game with fantastic physics system, a huge crafting system, and a damn good survival system.
If anyone has played project zomboid... It's pretty much that but in 1st person. Its fun. We have taken over a small town from zombies and are making a block of it a fortress. Every night there is a chance a hoard will attack. Every 7 days an infinite hoard attacks until day brake. Zombies will destroy whatever is in between you and them.