Yellow Soul is a free arcade game developed by Onutrem for Android devices. The game allows you to play as a yellow soul that shoots bullets to fend off the incoming Mettaton's army. The game's objective is to score as many points as possible before the army hits you.

The game has a simple yet engaging gameplay that requires you to use the joystick to move the soul and the button to shoot. The game's difficulty level increases every minute, making it more challenging as you progress. The graphics and sound effects are decent, which add to the overall gaming experience.

Yellow Soul is a great game to challenge your friends and see who can score the highest. It's an addictive game that you can play for hours on end. Overall, Yellow Soul is a fun arcade game that offers a challenging twist, making it a great addition to your gaming collection.