Have (all Steam codes):

Dead Island Riptide Complete Edition (Note: This is for US Steam only!)
Worms Crazy Golf
Worms Armageddon
Worms Pinball
BioShock
Sid Meier's Civilization IV: The Complete Edition
Sid Meier’s Ace Patrol
FTL: Faster Than Light Steam Key
Bastion Steam Key
Waking Mars Steam key

Origin:

Battlefield 3 Origin Key
Command & Conquer: Red Alert 3 - Uprising Origin Key

Want (GOG):

SEVEN CITIES OF GOLD: COMMEMORATIVE EDITION
DROD RPG: TENDRY'S TALE

...

Updated:
http://www.gog.com/forum/general/gogs_general_trading_thread/post938

Bump

Looking to get Amnesia: The Dark Descent, Cognition: An Erica Reed Thriller Episodes 4 and The Bureau: XCOM Declassified.

I added the bottom level of the Humble weekly sale, and the XCOM: Complete Pack.

My List

Have some bundle games
http://www.gog.com/forum/general/gogs_general_trading_thread/post8

Want: mafia 2 from the current bundle

Updated, I'm looking for Cities in Motion 2 (currently 75% off on GamersGate)

Anybody still got a free copy of Empire Earth: Gold Edition that they wouldn't mind trading for one of the following?

Paranautical Activity (Early Access)(Steam)
Micy Roll (Desura)
Zeno Clash 2 (Steam)
Magicka (Steam)

Edit: Got it.

I tried to PM you, but I can't for some reason. I've got Cook, Serve, Delicious if you're still looking for it.

I'm currently looking for Euro Truck Simulator 2 + Go East DLC, check my list if you want to trade.

Also interested in Banished and Gods Will Be Watching on GOG.

I'm looking for HumbleBundle keys:

Humble Bundle: PC and Android 1-6
Humble Bundle with Android 1-5
Humble Mobile Bundle 1-4

Here's what I have to give:
http://www.gog.com/forum/general/gogs_general_trading_thread/post365

over

I have two keys from Humble Bundle I like to trade.

I have:
Mafia II (Steam)
Bioshock 2 (Steam)

I'd like:
Xpand Rally Xtreme
Wings over Europe
Rogue Trooper
Screamer 4x4
Chrome
Chrome: Specforce
Call of Cthulhu: Dark Corners of the World
Galactic Civilizations 2
Need for Speed: Shift 1/2
A.I.M. 2: Clan Wars
Hard Truck: Apocalypse
Hard Truck: Apocalypse Rise of Clans
BurnOut Paradise

Or any other game that would interest me.

EDIT

Both keys have been traded and this post is no longer valid.

Edit: Thanks misteryo!

Deal no longer possible thanks to DampSquib's generousity!