I have been playing lots of free to play games on the PC because they are free, i also buy lots of games and if your like me and love fps games then Blacklight Retribution is a must try game.
if you really want to get serious about this game you will need to pay for the best guns but you can win points to do upgrades etc..
Read more for the best free to play game on the PC Blacklight Retribution.

This is the best game in my opinion for free to play fist person shooter (fps) games

Build a fighting machine

Wage war with advanced weapons and technology in Blacklight: Retribution, a free-to-play, futuristic first-person shooter. Deploy devastating armored exoskeletons and utilize lethal hand-held weapons in vicious competitive modes.

The Hardsuit is the ultimate weapon. Powerful but slow, this armored suit packs a one-shot, one-kill railgun and a high velocity minigun to clear rooms... fast. Only by using teamwork, heavy weapons from in-game Weapon Depots and the Hyper Reality Visor (HRV), can players overcome the futuristic killing machine.

The advanced HRV enables players to see opponents, teammates, Weapon Depots and Hardsuit weak points through walls, but at the cost of all offensive capability.Play with Hardsuits and the HRV alone or with a team of friends in one of Blacklight's tightly polished game modes. Current modes include: Deathmatch, Team Deathmatch, Domination and King of the Hill, but more are on the way.


Customize weapons, armors, taunts and more down to incredibly detailed levels. Play with muzzles, stocks, ammunition and more. Even configure the advanced weapons available from in-game depots.

Another favorite of mine is Gotham City Imposters but thats another post.