Added a few games to my list. :)

===Have===

=GOG=
Divine Divinity
Legacy of Kain: Defiance
Legacy of Kain: Soul Reaver
Legacy of Kain: Soul Reaver 2

=Steam=
Adventures of Shuggy
Beep
Bridge It! (Plus)
Civilization V
Crusader Kings II
Darkest Hour: A Hearts of Iron Game
Death to Spies: Gold
Ether Vapor Remaster
Fairy Bloom Freesia
Fantasy Wars
F.E.A.R. (Including F.E.A.R.: Extraction Point and F.E.A.R.: Perseus Mandate)
F.E.A.R. 2: Project Origin
F.E.A.R. 3
<span class="bold">Forge Starter Pack</span> (Double XP boost for 30 days + the legendary Shadow Armor)
Gorky 17
Greed Corp
Hydrophobia: Prophecy
Ittle Dew
King's Bounty: Armored Princess
King's Bounty: The Legend
Knights of Pen and Paper +1 Edition
Lord of the Rings: War in the North
Men of War
Men of War: Assault Squad GOTY
Men of War: Condemned Heroes
Men of War: Red Tide
Men of War: Vietnam
Mortal Kombat Kollection
Naval War: Arctic Circle
Red Faction + Red Faction II (One Key)
Reign: Conflict of Nations
Satazius
Shelter
Star Wolves 1
Star Wolves 2
The Ship (Steam Gift - Includes: The Ship Single Player, Multiplayer, and one extra copy of both games which you can gift or trade)
The Showdown Effect
Two Worlds II
Two Worlds II: Pirates of the Flying Fortress (DLC)
UFO Afterlight
XIII Century - Gold Edition

Indie Gala October - Gift URL
^(A collection of 14 games, including Crusader Kings II and Two Worlds II + Pirates of the Flying Fortress DLC)
<span class="bold">Humble Weekly: Team 17 Bundle - Non-BTA Gift URL
^(Includes: Worms Armageddon, Worms Ultimate Mayhem, Worms Blast, Worms Crazy Golf, Worms Pinball, and Superfrog HD.)

=Desura=
(Will trade 3-5 Desura keys for 1 Steam key on my wishlist!)
99 Levels To Hell
Angvik
Beep
Bob Came in Pieces
Bridge It
Deo
Diehard Dungeon
Dungeon Fray
End My World
Eryi's Action
eXceed - Gun Bullet Children
eXceed 2nd - Vampire REX
eXceed 3rd - Jade Penetrate Black Package
Farm For Your Life
Hack, Slash, Loot
Inverto + Editor
Last Knight
Man in a Maze
Micy Roll
One Finger Death Punch
Plith
Postmortem: One Must Die - Extended Scythe Cut
RefleX
Retention
Ring Runner: Flight of the Sages
Roaming Fortress
Suguri Collection
Survivor Squad
The Siege of the Necromancer
The Wizard's Lair
Undead Legions
Zigfrak

=FREE STUFF=
BigHead BASH In-game Content Pack
Droidscape: Basilica Exclusive Content (iOS Game)
Steam Guest Pass: Shattered Horizon (Grants full access to Shattered Horizon for a few days.)

===Want ===
(STEAM ONLY PLEASE)
99 Spirits
A Virus Named Tom
Awesomenauts
Bastion
Brütal Legend
Cognition (All Episodes)
DLC Quest
Escape Goat
eXceed 3rd - Jade Penetrate Black Package
MacGuffin's Curse
March of the Eagles
Party of Sin
Talisman
++Offers, especially for any games listed [url=http://steamtradingcards.wikia.com/wiki/Category:Supported_Games]Here[/url].++

Have (GOG) :

Dungeon Keeper Gold
The Witcher Enhanced Edition

Have (Steam) :

Ben There, Dan That & Time Gentlemen Please
Call of Cthulhu : the Wasted Land
Civilization 4 Complete Edition
Delve Deeper & DLC
Gemini Rue
Legends of Eisenwald
Shadowrun Returns
Shadowrun Returns : Dragonfall
War of the Human Tanks
Worms Crazy Golf
Worms Ultimate Mayhem
Worms Pinball

Want (GOG) :

Bad Mojo Redux
Banished
Broken Sword 5 : the Serpent's Curse
Harvester
Kentucky Route Zero
Last Door
Samaritan Paradox

Want (Steam) :

Emerald City Confidential
Massive Assault
Memoria
Might & Magic X - Legacy
NEO Scavenger
Pandora : First Contact
The Cave
Underrail
Vampire: The Masquerade - Bloodlines

If anybody's got a spare of either of the Operation Flashpoint games from the current Indie Gala Codemasters BTA bundle, I'm interested. Please check my list to see if I have anything you want.

[H]
Steam gifts
The Ship Complete
Starvoid

Steam keys
Edna & Harvey: Harvey's New Eyes
Burnout Paradise: The Ultimate Box
Greed: Black Border
Larva Mortus
Serious Sam HD: The First Encounter
Serious Sam HD: The Second Encounter
Star Wolves 3: Civil War
Hydrophobia: Prophecy
The 39 Steps
King's Bounty: Warriors of the North - Valhalla Edition
Sniper: Ghost Warrior Gold Edition

HumbleBundle(Steam)
Worms Blash
Worms Crazy Golf
Worms Pinball
Edna & Harvey: Harvey's New Eyes
Deponia
The Millennium Skins Pack for Batman: Arkham Origins

ORIGIN
Burnout Paradise: The Ultimate Box
Crysis 2 Maximum Edition
Command & Conquer: Red Alert 3 - Uprising

Desura
99 Levels To Hell
Quest Run
Cognition (EP1, EP2)

GOG
Witcher EE

[W]
Operation Flashpoint: Dragon Rising
Operation Flashpoint: Red River
Sanctum 2
Teleglitch: Die More Edition
offers

WANT:

Fez (GoG or Steam)
Super Meat Boy

Offers....


HAVE:

Steam Gifts:

Ghost Master

Steam Keys:

A Valley Without Wind 1+2
Brainpipe: A Plunge to Unhumanity
Chains
Cognition Episode 2
Crayon Physics Deluxe
Doc Clock: The Toasted Sandwich of Time
Edna & harvey: Harvey's New Eyes
English Country Tune
Fantasy Wars
Kings Bounty: Armored Princesss
Men of War: Condemned Heroes
Men of War: Red Tide
Obulis
Pacific Storm
Pacfic Storm: Allies
Race Injection
Rip Trilogy
Scratches: Directors Cut
Shattered Haven
Splice
Teleglitch: Die More Edition
The 39 Steps
The Whispered World
Ticket to Ride 1910 USA DLC

Desura:

99 Levels to Hell
Adventure Apes
Brainpipe: A Plunge to Unhumanity
Chompy Chomp Chomp
Cognition Episode 1
Cognition Episode 2
Constant C
Data Jammers: Fast Forward
Enamel
End My World
Ensign-1
Eryi's Action
Fibrillation
Gimbal
Hypersonic 4
Ichi
Kill Fun Yeah
Little Gardens
One Finger Death Punch
Paranautical Activity
Particulars
Pester
Postmortem: One Must Die Extended Scythe Cut
Project Night
RADical Roach
Reflex
Reversion - The Meeting
Serious Sam: Kamikaze Attack
Splatter
Survivor Squad
Undead Legions
Weird Worlds: Return to Infinite Space
Woodle Tree
Zigfrak
Zombusters

FOR TRADE:
------------------------------------
Steam:
Frozen Synapse
GTR Evolution (includes base game)
Space Pirates and Zombies
Death To Spies Gold
Alien Zombie Megadeath
Rune Classic
Crusader Kings Complete
Forge Starter Pack
Shelter
Call Of Juarez
Batman: Arkham Origins - New Millennium Skins Pack
Starvoid
Starpoint Gemini
Section 8
Dino D-Day
Really Big Sky
Sword of the Stars II Enhanced Edition
Data Jammers FastForward
The Ship + The Ship Single Player
Hack Slash Loot'
Particulars
Postmortem: One Must Die - Extended Cut
Fuel
Vox
Serious Sam 3 BFE
Garry's Mod

Desura:
Hack Slash Loot
Diehard Dungeon
Undead Legions
Survivor Squad
99 Levels to Hell
Last Knight
Face Noir
Vox
End My World
Hackwork
Adventures Of Shuggy
Hacker Evolution
Hacker Evolution Duality
Hacker Evolution: Untold
Project Night
Arcane Worlds


FOR FREE:
Todays free gift, PM me for:
End My World (desura)

Shattered Horizon Guest Pass (Steam Gift)
Populous: 9766-89SG-MPYU-QKVG-MYT6 (Origin)
March Of War Coupon: 3A3-NSE-E9A
BigHead Bash In-game Content: J-P4W2-2NTV-RMJH
(please let me know if something is already redeemed so i can remove it from the list)


WANT:
------------------------------------
GOG Privateer 2
GOG Wing Commander 5 Prophecy
GOG Theme Park
STEAM Sword of the Stars: The Pit - Gold Edition DLC
STEAM Titan Quest Gold
STEAM Guncraft
...or just send me your list, i'll take a look

Successfully traded with: Crsldmc, blakstar, Madmate, d456, jamiecol90, m0gb0y74

[Want]
- QbQbQb and Saviors (from current BIAB http://bundle-in-a-box.com/ )
- Sine Mora
- Jack Orlando DC
- Luxor 2 HD
- Intake
- Painkiller: Hell & Damnation
- Mars: War Logs
- Symphony
- Mad Riders
- Babel Rising
- Zeit²
- Strong Bad's Cool Game for Attractive People
- Offers!

[Have]
http://www.gog.com/forum/general/classifieds/post6900

edit: thanks very much, undeadcow :)

Have:

F.E.A.R. 2 (Steam)
F.E.A.R. 3 (Steam)

Want:

Rayman Origins (GOG)
Uru: Complete Chronicles (GOG)

I'm willing to trade both games for Rayman.

Does anyone still have an extra non-BTA Warner Bros Humble Bundle key/gift? I could trade the ongoing Humble Bundle or Humble Weekly for it.

(I will also settle for only FEAR 2 and FEAR 3 from that bundle, but the guy above me is asking too much for them)

Thanks.

edit: got the games, post no longer valid!

----------------- Thank you mate!! +1 -----------------------------------

Interested in Shelter from the Majestic Indie Bundle, let me know what you'd like in return!

http://www.bundlestars.com/all-bundles/majestic-indie-bundle/#title251tab

Thanks to Mr. Sachys this one no longer applies :)

----------------- Thank you mate!! +1 -----------------------------------

Interested in Magicka + DLC and Garry’s Mod from The Humble Jumbo Bundle, let me know which keys you'd like!!

https://www.humblebundle.com/

[Have]

Desura:

- Laxius Force I + Guide
- Zombusters

Steam:

- Dead Space
- Burnout Paradise: The Ultimate Box
- Crysis 2 Maximum Edition
- Medal of Honor
- Mirror's Edge
- Command & Conquer: Red Alert 3
- Red Orchestra Ostfront 41-45
- Zafehouse: Diaries
- Pacific Storm Allies
- Miner Wars Arena
- Paranautical Activity

Others:

- Iron Grip: Marauders - $10 Content Coupon
- Exoplanet: First Contact Developer Key

I'm interested in hearing offers aswell, just let me know through PMs!

I've traded with lots of known users here, lost my list, but managed to confirm some.

Successfully traded with: DarkoD13; Momo1991; Giltonnam; Darthprymus; Suzaku-sama; alexkoti; Accatone; agaiz; roelibex; IAmSinstar; d456; dyscode; adambiser; ErekoseDM.

Looking to obtain the Overlord games from the current indie gala!
Also looking for Orcs Must Die 2: Complete Pack from current Humble Bundle

Games for Trade

Steam:
Gifts:
Half Life 2
Natural Selection 2

Bundle Keys:
Gotham City Impostors: Professional Kit
Guardians of Middle-earth + Smaug's Treasure DLC
Men of War: Red Tide
Mirror's Edge
Reign: Conflict of Nations
The Millennium Skins Pack for Batman™: Arkham Origins

Coupons:
March of War $10 ingame coupon

Origin:
Burnout Paradise: The Ultimate Box
Command & conquer: Red Alert 3 - Uprising
Dead Space
Dead Space 3
Medal of Honour
Mirror's Edge
Populous

Desura:

Keys:
Chompy Chomp Chomp
Livalink
Major Mayhem
Particulars
Shadows on the Vatican I
Splatter
Super Panda Adventures

Gamersgate:
Heroes of a Broken Land (beta)
No Time to Explain
Tales of Maj'Eyal

GoG:

Keys:
The Witcher Enhanced Edition

Want:

Steam:
A valley without wind
Beat Hazard
Darkout
Frozen Synapse
Killing Floor
Knights of Pen and Paper
Salvation Prophecy
Lunnye Devitsy
MacGuffins Curse
March of the Eagles
Monaco
Sengoku
Serious Sam 3
Sins of a Solar Empire: Rebellion
Sol Survivor
Space Siege
Sugar Cube: Bittersweet Factory
System Shock 2
Titans Attack
Vox
Zack Zero
Zombie Driver HD

Desura:
Darkout

Offers

Successfully traded with Heretic777 and Th3R3n3gad3 :)

Have:

GOG:
BG1
Icewind Dale Complete
Thief 2
Torchlight
Myst: Masterpiece/Riven/Myst 5 LE (remainder of a Myst pack so they are together)

Steam:
Anodyne
Greed Corp
Incredipede
Ticket to Ride
Ticket to Ride - 1910 USA DLC
The Bard's Tale
Worms Reloaded
Ticket to Ride - Europe DLC
Organ Trail: Director's Cut
Broken Sword: Director's Cut
Anomaly Korea
Trine 2: Complete Story
Mark of the Ninja
Eets Munchies
Brutal Legend
FTL
FEZ
Rocketbirds: Hardboiled Chicken
A Virus Named Tom
LIMBO
Bastion
Closure
Defense Grid Gold
Dungeon Defenders (+ All DLC)
Jamestown
Shatter
S.P.A.Z. (Space Pirates and Zombies)
Faerie Solitaire
Knytt Underground
Really Big Sky
Nightsky

Want (GOG only please):
King's Quest 4/5/6
King's Bounty: Crossworlds
Hammerwatch
Possibly other 4X games that I don't have

Would be willing to trade like 10-12 of the Steam codes for a single GOG title (seeing as how they're from bundles).

Have completed trades with GogBot, zeffyr, drumsfellow, Th3ChosenOne, XEternalDreamX, DeMignon, ErekoseDM, Alephnot, mm3n, 23rd & Mostcus. (Also gave a myriad of codes during the Insomnia Sale.)

WANT:

Haegemonia Gold Edition
Return To Mysterious Island
Iron Storm
Amerzone: The Explorer's Legacy
Atlantis: The Lost Tales
Dracula Trilogy

Build your own Bundle

Pick 6 steam/desura items in exchange for one of the $2.49 or less items in the current GOG promo

Pick 8 steam/desura items in exchange for one of the rest of the items in the current GOG promo

Also interested in offers of Steam and other GOG games

HAVE:

GOG:

Populous: The Beginning
System Shock 2

Steam Gifts:

Ghost Master

Steam Keys:

A Valley Without Wind 1+2
Brainpipe: A Plunge to Unhumanity
Chains
Cognition Episode 2
Crayon Physics Deluxe
Doc Clock: The Toasted Sandwich of Time
Edna & harvey: Harvey's New Eyes
English Country Tune
Fantasy Wars
Kings Bounty: Armored Princesss
Men of War: Condemned Heroes
Men of War: Red Tide
Obulis
Pacific Storm
Pacfic Storm: Allies
Race Injection
Rip Trilogy
Scratches: Directors Cut
Shattered Haven
The 39 Steps
The Whispered World
Ticket to Ride 1910 USA DLC

Desura:

99 Levels to Hell
Adventure Apes
Brainpipe: A Plunge to Unhumanity
Chompy Chomp Chomp
Cognition Episode 1
Cognition Episode 2
Constant C
Darkout
Data Jammers: Fast Forward
Enamel
End My World
Ensign-1
Eryi's Action
Fibrillation
Gimbal
Hypersonic 4
Ichi
Kill Fun Yeah
Little Gardens
One Finger Death Punch
Paranautical Activity
Particulars
Pester
Postmortem: One Must Die Extended Scythe Cut
Project Night
RADical Roach
Reflex
Reversion - The Meeting
Serious Sam: Kamikaze Attack
Splatter
Survivor Squad
Undead Legions
Weird Worlds: Return to Infinite Space
Woodle Tree
Zigfrak
Zombusters

Have: GOG

Neverwinter Nights: Diamond Edition
Planescape: Torment
Startopia
Journey to the Center of the Earth
Pid
Torchlight
Duke Nukem 3D: Atomic Edition
also Steam keys (ask in PM if interested)

Want: GOG

Moto Racer 3
Moto Racer 2
Moto Racer
Syberia 2
Dracula Trilogy
Dracula 4
Still Life 2
Return to Mysterious Island
Atlantis 1-3 (never played them, reviews are mixed but as an adventure fan, why not)

Message me if you're interested in any of the games, I am looking to get at least one Moto Racer and fill in my adventure collection a little bit as I am a fan of the genre and Microids games in particular.