Fantasy Earth Zero is a 3rd-person action-MMORPG. There is a large emphasis on PvP on a massive scale. Armies of up to 50 players, each from their own Kingdom, can go head to head in a type of war known as "Kingdom vs. Kingdom." The KvK battles are balanced so that, on the battlefield, one side will have 50 players max and the opposing side will have 50 players. KvK battles are all held on the same server.
At character creation, they create a male/female scout, warrior, or sorcerer. Then, players must choose their allegiance; the Kingdom that they will fight for. This determines the King or ruler that speaks to the player on the battlefield and in towns.
You can also create clan/guilds to play with friends and cooperate with other people. These groups give special benefits.
One of the features of FEZ, that makes it different from most other fantasy-setting MMOs on the Free-to-Play market, is that attacks must be aimed manually and there is no auto-attack. Players manually aim at their opponent and then click the left mouse button to attack. Various special abilities become available to the player as they level up and gain Skill Points. Skill Points are spent to learn new abilities.