Undertale 10th Anniversary
Face Sans in the Undertale 10th Anniversary browser game, then take on Mr. Sunshine and Aberrant with careful movement, timed jumps, and endurance.
About Undertale 10th Anniversary
Undertale 10th Anniversary is a free browser game created for the RPG’s 10-year milestone. It focuses on special battles rather than a full retelling of the original adventure: you can face Sans, then challenge Mr. Sunshine and Aberrant, the duo featured in the anniversary livestream.
The Sans battle puts your soul on a battlefield while attacks push you toward the edge of the screen. Sans dodges attempts to fight back, so survival depends on careful movement, precise jumps, and endurance. The second battle adds different attack patterns for Mr. Sunshine and Aberrant.
How to Play Undertale 10th Anniversary
Move your soul around the battlefield and watch how each attack changes your position. In Sans mode, jumping at the right time helps you avoid being shoved off the battlefield. Attacking is not a winning strategy in this fight because Sans dodges those attempts and follows with a bulldozer-style attack.
Success comes from staying on the battlefield long enough to outlast the attacks. Use the movement controls to adjust your position, save jumps for dangerous moments, and pause when you need a break. Mr. Sunshine and Aberrant use their own attack patterns, so the same timing may not work in both battles.
Game Controls
- Arrow keys / WASD: Move your soul on the battlefield
- Spacebar / Z: Confirm an action or jump in Sans mode
- Esc / P: Pause the game
