SuperBeaverInc.
Groucho
I disagree on Mafia II. I thought it was a decent game.
Fair warning synsensa, mafia 2 is awful.
www.steamcommunity.com/games/RO2/announcements/detail/1353639133892980334
Red Orchestra 2: Heroes of Stalingrad will be given away on Steam for free for 24 hours.
Rising Storm expansion will have a free weekend, but to get full access to it you still have to buy it. However, you can still play RS without buying it if you have HoS, you are just restricted to the Rifleman class (which is the main class anyway).
Risk of Rain on steam for 3 now. Good value if youlike rogue-lite gameshate yourself.
Humble bundle is doing a new bundle every day for 2 weeks. Today's has saint's row 3, risen 1 and 2, dead island, metro 2033 and more. Pretty darn good bundle, I'm excited for tomorrow's.