3DTale - Sans is a free Android game developed by Eight Blackey that features a 3D battle against Sans, the notorious character from Undertale. This game was created to celebrate the game's third anniversary. However, it is recommended that players finish Undertale before playing this game to avoid spoilers.

The game has a 3D interface and the battle is similar to other action games, with players using a stick to move and buttons to attack, jump, and eat cupcakes. Sweeping the screen turns the camera around. It is important to note that an internet connection is required to play this game as it runs on ads.