One of the Xbox One’s biggest upcoming games is no more: today Microsoft revealed that action game Scalebound has been canceled. “After careful deliberation, Microsoft Studios has come to the decision to end production for Scalebound,” the company said in a statement. The game has been in the works for more than four years, and was being developed by Japanese studio Platinum Games, best known for fast-paced action titles like Bayonetta and Vanquish.

At Gamescom in 2015, Scalebound director Hideki Kamiya claimed that the game — which was to include features like four-player co-operative play and massive boss fights — was the studio’s biggest to date. Scalebound was scheduled to launch on both Xbox One and PC, and was being published by Microsoft.

According to a report from Eurogamer, last fall several key members of the development team were forced to step away from the project for a month due to “the pressure of the project's heavy workload.” When they returned, the game was behind schedule and the decision was made not to move forward.

Scalebound was one of just a handful of big exclusive titles due to hit Microsoft’s console this year, alongside the likes of strategy title Halo Wars 2, pirate game Sea of Thieves, and open-world action game Crackdown 3. As for Platinum, the developer is also working with Square Enix on the action-RPG Nier: Automata, which is scheduled to launch on March 7th on PlayStation 4.