Ultra Ultra, developer of the clever stealth game Echo, has “ceased to exist” according to a tweet on the company’s Twitter account. For a detailed breakdown of what made Echo so special, check the video above. Good luck, Ultra Ultra devs, and thanks for the incredibly cool game.

Sci-fi adventure Echo’s first gameplay trailer is on YouTube today and it looks so dope. In the game, a girl named En explores a legendary, ancient palace that, according to developer Ultra Ultra, “has a mind of its own.”