Marvel Heroes, the free-to-play, Diablo-esque action game, is shutting down. Marvel announced the news today, revealing it has ended its business arrangement with developer Gazillion Entertainment.

In a statement shared with GameSpot, Marvel Entertainment stated, “We regret to inform our Marvel Heroes fans that we have ended our relationship with Gazillion Entertainment, and that the Marvel Heroes games will be shut down. We would like to sincerely thank the players who joined the Marvel Heroes community, and will provide any further updates as they become available.” This presumably applies to the PC version of the game (first released in 2013) and the Omega versions fully released on PS4 and Xbox One earlier this year. We’ve followed up with the company to find out more about the timeline for the game’s shutdown.

No further explanation was shared for the decision. Kotaku, which first reported the news, notes that updates and communications from Gazillion have been absent recently. A current and former employee told the site that some people were told to not come into work this week, so it appears this move has been brewing for some time.

As noted above, Marvel Heroes is an action-RPG in the mold of Diablo, but with a free-to-play business model. It features a wide variety of Marvel characters, with players able to obtain everyone from the Avengers to the Guardians of the Galaxy to Inhumans. We’ll report back as we learn more about how Marvel is handling the shutdown.