Merge Monsters: Horror Royale is a free action game developed by Dats.Games for Android devices. In this game, you play as a monster that has escaped from a lab, and your objective is to collect new parts to grow stronger and create new mutations. You must also hunt lab workers and fight against other mutants to become the most epic horror monster.

The game features many levels to explore and challenges to overcome. The gameplay is simple and easy to understand, with intuitive controls that make it accessible to all players. The graphics are well-designed, and the sound effects and music create a spooky atmosphere that enhances the horror theme of the game.