Command Strike FPS — play online for free on Yandex Games

World War 3 on Steam

MaskGun: FPS Shooting Gun Game - Apps on Google Play

Gun Strike: FPS Shooting Games - Apps on Google Play

Embark Studios Announces New Free-To-Play FPS With Destructible Environments

Hawken Reborn is a bland singleplayer mech FPS built on a hostile free-to- play model

Top 5 First Person Shooter Games Free To Play 2015 PC - video Dailymotion

Play This FPS For Free on Steam This Weekend - GameSpot

Nexon to publish Crytek's free-to-play FPS, Warface

What are the best free FPS games on Steam? - Quora

Crytek's free-to-play FPS Warface coming to Xbox 360 in 2014 – XBLAFans