Mojang Studios built Minecraft Dungeons on Unreal Engine 4 with a team of roughly twenty developers. They chose UE4 over their own internal engine because it delivered the animation quality, VFX fidelity, and multiplayer infrastructure they needed for a cooperative action-adventure — something their proprietary tech couldn't match.
The project pivoted from single-player to co-op mid-development, a shift that would have derailed a custom engine build. UE4's source code access let them customize for multiple platforms — Xbox, PlayStation 4, Nintendo Switch, and PC — while keeping divergences from mainline engine updates minimal.