Metroid Prime developer Retro Studios' mysterious cancelled platformer has been streamed for more than four hours

Fans of Metroid Prime developer Retro Studios are continuing to explore a leaked build of Harmony, the company’s now-cancelled 3D platformer.

Last week, more than four hours of Harmony were streamed by a user with access to the game’s work-in-progress version – and for those watching, it was their best look at the game yet.

Harmony was a linear 3D platformer in development at Retro Studios during the Wii U era, it’s believed. All development stopped prior to the team beginning work on the upcoming Metroid Prime 4.

But while a finished version of Harmony will likely now never see the light of day, an unfinished version continues to pop up online, played by fans keen to showcase what was being worked on.

“This is purely for preservation purposes,” reads a disclaimer by Twitch streamer Stumblyn, who played the leaked build of Harmony and then posted the footage to YouTube. (Other videos showing Harmony gameplay footage have been removed, so it may be this also doesn’t last long.)