Borderlands 2 - Free Golden Keys

[Harbinger]

Borderlands 2 Golden Keys Incoming - Gearbox Software Community

[Ritzo90]

Also now on tweeted by gear box and it looks like their facebook page this weekend also. I've only got 2 or 3 keys and crap items from it but hey it's exciting all the same.

[Milenko]

Harb got me on to this a couple weeks ago and I've been spamming friends with the keys occasionally.

The Golden Key (SHiFT) codes are put up on the Twitter page of Randy Pitchford every 10hrs or so, a few days a week.
They are only good for one redemption per user; but thousands of unique redemptions in total. I've found through trial and error that they generally last up to 2hrs before all the redemptions are used up.

https://twitter.com/DuvalMagic