Toby Fox, creator of the critically acclaimed indie RPG Undertale, took to Twitter to tease an upcoming announcement for his next project. Fox will tweet out the announcement on the Undertale Twitter account on October 31.

　　"For those who completed Undertale, it's really important that you check [the Undertale Twitter account] 24 hours from now," Fox tweeted on October 30 at 6:02 AM PT / 9:02 AM ET / 2 PM BST. "I want to make something new," he continued, "and it all begins with your feedback." Fox provided no additional hints as to what the announcement might be, only that those who wish to participate in helping him with his next project will require Windows PC or macOS X.

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　　Now Playing: Undertale Switch Gameplay - Undyne Boss Fight Pacifist Run

　　The last major Undertale announcement was the reveal of a Nintendo Switch port, as well as a new physical collector's edition of the game that comes with a golden heart-shaped locket that plays music. Fox has kept further details about the game's future close to the chest, and fans have wondered if Undertale might be getting a sequel that spawns a franchise. The indie title has dozens of in-game secrets, a meta narrative, and references to the Mother series--some of which are still unexplained. Players have theorized these details might be explored in future Undertale games.

　　In our Undertale review, Tyler Hicks gave the game a 9/10, writing, "Without spoiling the many ways it will screw with your expectations, it isn't possible to truly capture how wonderful Undertale is. You wouldn't know it with a passing glance, but it's one of the most progressive and innovative RPGs to come in a long time, breaking down tradition for the sake of invention, with great success."

　　Undertale is available on PS4, Switch, PS Vita, and PC.