A spare copy of Duke Nukem Forever from the Humble 2K Bundle 2. From my review 5 years ago, unedited.

Don't come into this game expecting something incredible or legendary. It is mostly a FPS with set pieces of different sorts. There's shooting, driving, and having fun with the environment. The graphics are fine. Duke is as great as ever.
Yes, the 2 (4 now!) weapon limit is (not so) awful. So is the lack of health packs and the use of regenerating health (aka Ego). Despite these grievances, Duke Nukem Forever is still a great game to play.

The winner will see the key on Steamgifts once confirmed.