Grab Europa Universalis III for nothing
Free games are pretty great, especially if, like me, you are always finding yourselves flat broke. To celebrate having over 500,000 forum subscribers, Paradox Interactive is offering everyone on its forums a free copy of the wonderful Europa Universalis III. Specifically, it's the Chronicles edition, which comes with the title's four expansion packs.
Five forum subscribers are also being selected at random to receive the entirety of the publisher's rather large library, including my personal favourite, Crusader Kings II, and the amusing co-op wizard adventure, Magicka.
If you're a forum member, check the email you registered with and you can get a key that allows you to redeem EUIII: Chronicles on Steam. Not too shabby for just signing up on the forums in the past.