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.

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.

CrossFire is a 3D first person shooter were player's need to gain experience in order to level up in rank and buy new weapons or try they're luck on black market in order to win advanced weapons.
Currently there are like 35+ weapons including the one's from Black Market, 11 pistols, 4 grenades, 4 melee.
All the matches can be played with 2-16 player's.
You can crate or join a clan, have clan war's and earn clan point( 500 exp=1 clan point), you can do missions, at evry 5 missions complete you get a reward and you need to create the word CrossFire with some tag's that drop randomly at the missions, after you completed the word you can exchange the tags with 5 deagle scopu crates( you can purchase only with zp).
Varied maps so you wont get bored to quickly.