Alright, two offers are currently available. Metro 2033 for 24 hours, and Little Big Adventure until November 11th or something, so better snag them quickly.
Metro 2033 is for free on Humble Bundle. If I recall, it was a small nice narrative-focusedish shooter. I don't know. I did play Last Light, the sequel, which I thought was pretty stellar (not phenomenal, but it got what it got right). Bear in mind that even though Last Light was handled by Deep Silver, this was after THQ had worked on it a little, so chances are that Metro 2033 won't be all that different from its successor. I'm very interested in trying 2033, so this is an excellent offer for me.
Metro 2033 does require you to have a Humble Bundle and Steam profile to accept. It's a silly system, but once you get past that, you have your free copy of Metro 2033.
https://www.humblebundle.com/store
Little Big Adventure is for free on Good Old Games. I have no idea what this game is. I'm guessing it's...no. No clue whatsoever. All I know is that it's a relatively old game (dates back to the 90s), and is by a French Studio. Eh. It's free. Pick it up if you want. I did.
Little Big Adventure requires you to own a GOG.com account. Be patient; the buttons and whatnot are very notorious. At least for me.
http://www.gog.com/
