Just an extra copy of Portal 2 I have. I got it from pre-ordering the Steam Controller, so I might as well do something with it.

This game will be sent to the email associated with your account on this site. If there is a problem with that, please feel free to contact me after winning.

Good luck and have fun with it! I know it isn't as good as that new, fancy, Fallout 4 game everyone's talking about, but at least it's something.
(I wish I had enough money to do some Fallout 4 giveaways, but I cannot, sadly. Sorry!)