ABOUT:
The Operation 7 FPS is in Open Beta and is playable for free from Netgame. It is intended for those over 18 because this first person shooter game is more violent. Age verification is required. The best feature about the Operation 7 MMOFPS is the weapons building system which allows you many options to create and modify weapons.
Links:
Oficial site: http://op7.netgame.com/
Download game: http://op7.netgame.com/support/download.php
FAQ of game: http://op7.netgame.com/support/faq.php