Combat Arms

Highly-customizable, free-to-play online FPS, Combat Arms deploys players into a dangerous war zone teeming with soldiers of fortune looking to make a mark. This online shooter aims to advance the FPS genre by offering a rich free-to-play experience and introducing customization features unavailable in the current generation of online FPS games. Players have the ability to tailor their gaming experience by customizing how their characters look as well as which guns and equipment to carry into battle. A large arsenal of deadly weapons can be modified with attachments such as silencers, scopes and extended magazines.

Text copied from:
http://www.gamestats.com/objects/142/14255659/

LINKS:
Nexon
Combat arms