TRADABLES

• Borderlands GOTY => 5 keys
• Counter-Strike: Source => 4 keys
• Dawn of War Franchise Pack => 12 keys
• Garry's Mod => 3 keys
• Krater - Character DLC Mayhem MK13 => 1 key
• Krater - Collector's Edition => 5 keys
• Orcs Must Die 2 Complete => 5 keys
• Saints Row The Third - Full Pack => 10 keys
• Serious Sam 3: BFE => 4 keys

all these games have Co-op modes.
For some of the games I have multiple copies
Add me directly on steam, for discussion

All tradeables
Awesomenauts - 3 keys
E.Y.E:Divine Cybermancy - 3 keys
Ace of Spades - 4 keys
Killing Floor - 5 keys

All the co-op games I have:
Tradable Games
Alien Breed 3: Descent - |1 TF2 Key|
Iron Brigade - |5 TF2 Keys|

Steam Key
Warhammer 40,000: Space Marine - 4 keys

Cheap Steam keys 1 TF2 key for 2 Steam keys
Dead Horde
Demigod
Magicka

Torchlight 2 - 7 keys

Primal carnage - 4 keys

Cubemen - 1 key

Sniper Elite: Nazi Zombie Army(KEY) for 4key ?

Left 4 Dead for 3 keys?

cs:go - 7 keys

Madballs in Babo:Invasion - 3 Keys?

Trine 2 - 3 keys

Deadlight 3 keys

Ace of Spades Complete 4 keys

L4d2 4 keys

Terraria 2 keys

Civ V key for 4 keys?

Resident Evil 5 for 4 keys?

pes 2013-12 tf2 keys

civ 5 : gold edition = 9! :)

PAYDAY: The Heist(key)-3 TF2 key

xcom eu for 7

Two worlds 2 bundle for 4 keys :)

half life 2 - 2 keys

My Valve Complete Pack (From 2013, Not-Tradeable, Will be Tradeable on 23th April) for 26x TF2 Keys or 1x TF2 Earbuds.