Eudemon Online is a 2D fantasy MMORPG published by TQ Digital. Eudemon Online joins the family of TQ Digital games, Zero Online, Conquer Online, Crazy Tao, games which are quite similar because they virtually have the same core gameplay, features and interface, with some minor differences in the graphical chapter and some other parts.

Eudemon Online give the player the option to hatch, train and control their own Eudemon. Players can carry up to 12 Eudemons at once and choose from over 30 Eudemons found in the game. The game has a very limited character creation and only three classes to choose from. The classes are:

Warrior – The usual tank character with the strongest melee damage in game and with superior defense. It lacks ranged skills.

Magician – They are capable of dealing huge amounts of damage with their AoE spells, but they are rather fragile compared with the other two classes.

Paladin – The hybrid class of the game. It combines the warrior and the magician class allowing the paladin class to inflict considerable damage both with melee attack and magic.

The game is largely focused on player-vs-player it allows players to take part in major battles as it promotes open PVP environments. An interesting feature of Eudemon Online is XP skills. These kinds of skills depend on an xp bar which fills in direct connection with the player’s combat action. Once the xp bar is filled, these spells can obliterate almost any enemy surrounding the caster.

Eudemons Online provides players with an experience that can be compared to various monster collection titles such as Digimon and Pokemon. Players have the opportunity to collect and train a huge variety of powerful demons, each of which can provide players with extra skills and abilities in their arsenal. There's very few free MMO games that offer such depth in regards to character customization making Eudemons Online one of the most innovative MMO games of this generation.

Although the game has its flaws, it offers a great gameplay experience and an innovating pet managing system.