Critter Conquest is a Facebook based social game, multiplayer and singleplayer city buider and strategy battle game, you are the ruler of a Critter Kingdom and build the strongest kingdom, raise an army and conquer your enemies, is free to play on Facebook, from ClipWire Games.
War Robots is a Free-to-play
Third-person, Multiplayer Shooter Game playable on Facebook Gameroom
and featuring dozens of combat robots, hundreds of weapons
combinations, and heated clan battles .
Evil Genius Online is a browser based (Facebook based) social game, strategy, 3D tycoon game, you build an ultra-secret underground lair and command your army of minions to carry out your evil plans as you plot to control the world, is free to play in open beta on Facebook, from Rebellion Interactive Limited.
Nords Heroes of the North is a Free to Play, Online Strategy MMO [massively multiplayer online] Game that draws its inspiration from age-old tales of Norse mythology like Thor and Odin.
Throne Rush is a cross-platform social game, Massively Multiplayer Online Real Time Startegy (MMORTS, MMO, RTS) and village builder game, free to play on Facebook and on Android mobile devices, from Nexters.
Dragon City is a cross-platform social game, dragon-themed casual game, island builder and adventure game, free to play on Facebook, as well as on mobile devices - Android and iOS (iPhone, iPad, iPod), coming from Social Point.