In honor of its two-year anniversary, seminal survival-horror RPG 7 Days to Die will be free to all Xbox Live Gold members playing on Xbox One from Thursday, June 21 at 12:01 a.m. PST until Monday, June 25 at 11:59 p.m. PST. During that time, you’ll be able to download the full game and explore, craft, build, and survive until the clock runs out.

If you decide one long weekend of zombie slaying isn’t enough, you can purchase the game for 50% off during the Telltale Games Publisher Sale, which offers savings on nearly every game in Telltale’s award-winning catalog and runs from Tuesday, June 19 until Monday, June 25.

Set in an unforgiving post-apocalyptic world overrun with zombies, 7 Days to Die offers a truly unique open-world experience that contains elements of first-person shooters, survival-horror, tower defense, and role-playing games. It combines combat, crafting, building, looting, mining, exploration, and character growth, with both cooperative online multiplayer and split-screen multiplayer available throughout. You might want to recruit your friends to help you out this weekend since, come night of the seventh day, you’ll face an intense undead onslaught unlike anything else in games.

If you’ve never tried 7 Days to Die before, now’s the perfect time to start building your own zombie-repelling fortress, but even if you played the game when it first hit consoles nearly two years ago, consider diving back in. The team has spent the past two years adding content, improving features, and polishing tech, ultimately shaping 7 Days to Die into a far more robust experience than the one that debuted in 2016.