Monster Complete World could be considered like some kind of Pokémon game for PlayStation. The player controls a young kid that have to start his journey buying a pet and after that he will explore the land in search of new pets. The battle system is like this: You order different kind of attacks to your pet and when you see that the enemy is weak enough you can try to catch it to join it to your party. The monsters you catch will join your party and can be used in the next battles. The player can also buy different kind of goods to cure his pets or improve them.