Rainbow Fusion: Merge Master is a free arcade game developed by Boss Level Studio for Android devices. The game is set in a world where blue monsters evolve, and you can be the Merge Master by matching and upgrading letters to evolve your army. The game is all about merging and strategizing to become the ultimate champion.

The game is simple to play, where you need to combine similar monsters to evolve them. You also need to arrange your army strategically to defend your land and unlock new characters by matching them. The game offers a merging battle arena where you can test your smart tactics and skills against your rivals and lead your army to glorious victory. With colorful graphics and engaging gameplay, Rainbow Fusion: Merge Master is a fun-filled fusion game that will keep you entertained for hours.