Telltale have been very busy lately, in-between signing deals with Netflix and tussling with their former CEO. The studio that (gradually) popularised episodic games has a lot on their plate, and now they’ve got a pretty heavy dessert lined up for once they’ve finished the upcoming fourth and final Walking Dead game season. According to anonymous sources speaking to Variety (and somewhat supported by job listings), the studio are retiring their long-lasting but occasionally wonky in-house Telltale Tool engine and moving over to Unity.