Project Zomboid, the long-running Early Access zombie survival game has recently seen a very interesting surge, repeatedly blowing away their previous records for players online.
My wife is obsessed with this game, and she normally hates zombies. Personally I can play it for a couple of hours, but I think the early game is the most fun and I tend to lose interest. Looking forward to when they'll flesh out late game and add stories/missions or whatever they were going to call it.
Love project zomboid, but hate their update posts that always sounds like the next update is just a few weeks away, while in reality it might take years.