Toby Fox, creator of Undertale, is celebrating the game's 5th anniversary in style. A special concert is going to be held on September 15th, 2020 at 10 PM EST, which will feature tunes from Undertale as played by MUSIC Engine. This concert will be streamed, which you can watch on the official Undertale YouTube channel or website.
Along with that, Toby Fox has also designed a t-shirt. It will include artwork from Fox on the front, and all proceeds from sales go to charity. More details on this shirt will be shared on the official Undertale website on Sept. 15th, 2020.