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Bioshock for it?

http://www.steamtrades.com/trade/cHqPT/300-gamesblurgmodtdu2csstom-packwoffersl4d2portal2darksporebioshock-2cs-16pack/search?page=62

showdown effect key? humble weekly bundle kf bta url?

One of them ? for Portal 2

The Haunted: Hells Reach

Fireburst

Nuclear Dawn

Section 8: Prejudice + all dlc

Red Faction: Armageddon

Renegade Ops

Ravaged

Company of Heroes: Tales of Valor

Dungeon Defenders

Tiny and Big: Grandpa's Leftovers Soundtrack Edition

Red Orchestra 2: Heroes of Stalingrad - GOTY

All tradable gifts