WolfTeam is a 3D FPS released by Softnyx, this game has an unique mode, and i don't think you can call it a mode but anyway you can change from a Marine into a Werewolf, but as a Marine you see you're self in first person and when you are are a Werewolf you see you're self as in 3D.
The difference between this 2 caraters  is that the Marine are good from distance and have small hp, and Werewolf are good at close range combat, they can deal 1 hit kill to a Marine and have huge hp.

Cabal is a 3D MMORPG based on quest's and exploring the regions and the maps.
You start off in one of the three towns and explore the world of Cabal.
There are 6 classes:
Warrior, Force Shielder, Blader, Force Archer, Wizard,Force Blader.

4Story is a 3D MMORPG that you could say it's a copy of WOW, in this game you have three factions Defugel, Craxion, Broa, three races Werebeast,Fairy, Human, and 6 classes Assassin, Archer, Summoner, Priest, Warrior, Wizard.

Combat Arms is an 3D FPS, and if you like FPS you're lucky cause this is one of the best FPS that you could play, you need to level up in ranks, earn money and buy weapons and gear so that you can stay longer in battle, Combat Arms has allot of maps and mod's and this is the first game i had ever seen where you and you're teammates need to fight against the PC.

Lineage 2 is a 3D mmorpg and i consider it one of the best games ever, and i don't say it just because i palyed it along time ago, i say it because the graphichs, skills, classes and all others can be described in one word FANTASTIC.
Lineage 2 also called L2 has 3 versions and they are Hellbound, Garcia and Interlude, and they all are free to play.
In this game you have a varied carcaters, and they all can choose between a diverse classes, and i can say that there are allot of classes and that's what make's L2 so fun.
Humans: and they can be warrior and mage.
Elf: warrior or mage
Dark Elf: warrior or dark elf
Dwarf: warrior
Orc: warrior or mage
Kamael: warrior

Metin2 is a 3D mmorpg that is based on quest and hard grinding in order to reach max level that is 99, metin2 us is a game for all players around the world that want to use combo skill and attack more groups of mobs, in this game you have 3 kingdoms Red, Blue and Yellow and they all want to gain more power in order to rule the other kingdoms.
You have 4 type of classes and they all have 2 different types of jobs:
Sura: Mirage and Black Magick
Warrior: Arhan and Partisan
Mage: Lightning and Dragon Force
Assassin: Assassin(2 daggers) and Archer
They are different from each other caracter, depends on how you create you carcater, skills and you're status points.

Twelve Sky 2 is a free to play 3D MMORPG, and the action is somewhere in ancient China.The game is published by aeriagames that also own Shaiya, Last Chaos, Wolf Team etc.
This game is based on quests and pvp, there are 3 factions Guanyin, Fujin, Jinong and there is another on Nangin that you can become one only if you complete a certain amount of tasks.