One of these:
GIFTS:
Burnout Ultimate Box
Dead Space 1
Dead Space 2
Dungeon Defenders
Evil Genius
Garry's Mod
Metro 2033
Nexuiz
Portal 2
Railworks 2012 Deluxe (update to RW2013 is automatic and free, extra DLC)
Risen
Rome Total War Complete (includes Alexander)
Spore Creepy and Cute Pack
Star Wars Knights of the Old Republic
Terraria
The Witcher Enhanced Edition
The Ship 2-pack (gives an extra gift copy on activation)
Titan's Quest Gold (2 games)
Torchlight
Trine Franchise (1+2)
Warhammer 40K Dawn of War Platinum (3 games)
STEAM KEYS:
Deus Ex: Human Revolution Augmented
Deus Ex: Human Revolution The Missing Link DLC
Hitman Blood Money
Just Cause
Just Cause 2
Quantum Conundrum
Supreme Commander 2
Chime
Commandos 3 Destination Berlin
Cortex Command
Reign: Confict of Nations
Rig n' Roll
Space Rangers
Theater of War 2: Africa 1943
The Void
HIB3 Android 3 Bonus key (World of Goo, Anomaly, Osmos, EDGE)
NON-STEAM KEYS:
CoH: Tales of Valor (works with Steam if you already have another CoH game to use the key with or off-Steam standalone)
ARMA 2
MISC:
Impreial Tricorne (SK item)
Medieval War Helm (SK item)
Golden Laurel (SK item)
Genuine Foppish Physician (TF2 item)
Genuine Distinguished Rogue (TF2 item)
Genuine King of Scotland Cape (TF2 item)
Genuine K-9 Mane (TF2 item)
Genuine Stovepipe Sniper Shako (TF2 item)
Steam Community Beta Access (tradable)
Airmech Beta + 1000 Diamonds (key)
Firefall Beta (key)
Loadout Beta (key)
Don't add me
Looking for Warband, maybe.