Slime Rancher came out of early access and made its official launch on August 1 st. Slime Rancher has sold over 1 MILLION copies! Our deepest thanks to every rancher out there who made this weird game a gordo-sized hit! /kiDtPlckR1 The news came via an official tweet from Monomi Park, where they extended their gratitude to players who have helped make the game “a gordo-sized hit”. Monomi Park, the developer behind the slime ranglin’ success Slime Rancher, has recently announced that they've sold over one million copies of Slime Rancher across Xbox One, PC, Mac, and Linux.