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If you'd be interested in Trine 2: Complete Story for 2 keys add me :D
Or maybe Guns of Icarus Online for 2 keys, or 3 gifts of Guns of Icarus online for 5 tf2 keys.
I do also got Guns of Icarus (1) for 1 tf2 key, Forge for 2 keys, STALKER: Shadow of Chernobyl 2 keys, Nuclear Dawn 2 keys, Bunch of Heroes 2 keys :)
Click here to see all my games that I got for trade for tf2 keys + prices