For anyone who likes games like Diablo III then a free to play game has just dropped on Steam today - Path of Exile.
I've downloaded it (around 5GB) but have yet to try it, though from the trailer and the screenshots, it looks sweet (and did I say... it's free).
Also, for those a little wary of free to play (and the advantages folks sometimes get by purchasing premium items) the developers have this to say:-
Fair to play. Never Pay to win.
We're committed to creating a fair playing field for all players. You cannot gain gameplay advantage by spending real money in Path of Exile.