Nexomon is set in a world full of monsters, in which there are more than 300 kinds of beasts and monsters that have distinctive habits and attributes, and which can be captured. When players capture these monsters they can train them, and after training the monsters will become more and more powerful, and the way to train them is of course to fight other wild or other player-owned monsters.

The game's world consists of ten different environmental areas, with different monster dwellings in the jungle, volcanoes, beaches and other areas, which can be busy for many players who like to collect.

Nexomon" provides players with 300 different kinds of monsters, each with its own attributes, and players are free to capture and train them to improve their combat power. Overall, it is the same as the Pokémon series.