MINIDAYZ, which began life as a fan-made tribute to DayZ, has quietly been picked up by Bohemia Interactive and is now hosted on the publisher's site - for free - as an "official" DayZ title.
It's a top-down game that shares the same basic premise as DayZ - scrounge around to stay alive while fighting off zombies - only this one is only for solo play, as it doesn't support multiplayer.
But whatever! It's free, it's cute, and it's playable in your browser.