Unturned just handed the keys to its entire engine over to the community, and the timing feels perfect for a game that's been trucking along since 2014. Smartly Dressed Games dropped the full U3 SDK on GitHub under a strict non-commercial license, letting modders build new features, total conversions, or whatever wild zombie survival spin they dream up—while the official Steam version keeps getting updates like that massive California map overhaul from April. The devs straight-up said the move is about letting players build a "lasting legacy" no matter what happens to the main game down the line.