FREE TO PLAY GAMES ON STEAM #1

1. Knight Online
   
   Game video: http://cdn.edgecast.steamstatic.com/steam/apps/256671999/movie480.webm?t=1477089680
   Game link: http://store.steampowered.com/app/389430/Knight_Online/

2. Warframe
   
   Game video: http://cdn.edgecast.steamstatic.com/steam/apps/256700686/movie480.webm?t=1510607961
   Game link: http://store.steampowered.com/app/230410/Warframe/

3. Team Fortress 2
   
   Game video: http://cdn.edgecast.steamstatic.com/steam/apps/256698790/movie480.webm?t=1508541859
   Game link: http://store.steampowered.com/app/440/Team_Fortress_2/

4. Paladins
   
   Game video: http://cdn.edgecast.steamstatic.com/steam/apps/256677446/movie480.webm?t=1483542864
   Game link: http://store.steampowered.com/app/444090/Paladins/

5. Black Squad
   
   Game video: http://cdn.edgecast.steamstatic.com/steam/apps/256683184/movie480.webm?t=1494534823
   Game link: http://store.steampowered.com/app/550650/Black_Squad/

I found Black Squad interesting. I hope you enjoy them all.
Images source: http://store.steampowered.com/