Hello gamers!
A game called FurryFury: Smash & Roll is currently free-to-play. However, it will become a paid game on all platforms on 17th February.
And no, it’s not a game about “those” furries, but rather little Pokemon-like-ish creatures. 
Game Description:
FurryFury is a game of skill, where the deceivingly cute furry beasts settle their differences by rolling and smashing against one another in deadly arenas. Play solo, with a friend (or against them), beat the challenges or battle other players online.
You can add the game into your Steam library before 17th February and keep it free forever.
You can grab the game here: FurryFury: Smash & Roll on Steam
And read more about the transition from free to paid here: FurryFury: Smash & Roll - BIG UPDATE... is coming - Steam News.