In Monster Egg 3D: Merge Parts, you can fight against your rivals and get away from their attack. The main gameplay is to build your own monster from different monsters and then fight them with your rivals.

In order to do this, you need to collect the DNA of various monsters. After that, you can create the most powerful mutant by merging the different parts of the body. Once you merge two monsters, you can transform it into an even stronger monster. If you make the monster stronger, then it can destroy the monsters in the arena.