The Video Game Critic

http://www.pcgamer.com/uk/2014/07/31/free-steam-key/

Vexer you have steam and this gives you 5 free games.  Including Dino D Day....  Call of Duty meets Dino crisis with a bit of Castle Wolfenstein thrown in for free.

I picked up Really Big Sky early on because it only required a Twitter. I don't have a Facebook and I'm not interested.

Really good over the top bullet hell shooter though, fully recommended.