vidsgame: [Have]:

_Steam_:
-Braid
-Door Kickers
-Duet
-Else Heart.Break()
-Gunnheim
-Hektor + Official Soundtrack DLC
-Schein
-Soulless: Ray Of Hope
-Avencast: Rise of the Mage
-Frontline Tactics Complete Pack
-Chains
-Crash Time 2
-Dark Matter
-HOUND
-Larva Mortus
-Nikopol: Secrets of the Immortals
-Obulis
-Orange Moon
-Rhiannon: Curse of the Four Branches
-Space Hack
-Space Trader: Merchant Marine
-Starion Tactics
-Sunless Sea
-Tank Universal
-The Silent Age
-Trine 3: Artifacts of Power
-Vive le Roi
-Wasteland Angel

[Want]:

_GOG_:
-Assassin's Creed®: Director's Cut
-Bastion
-Beyond Good & Evil™
-Carmageddon Max Pack
-Carmageddon 2: Carpocalypse Now
-Darksiders II: Deathinitive Edition
-Dragon's Dogma: Dark Arisen
-FEZ
-Gothic
-Gothic 2 Gold Edition
-Gothic 3
-Legacy of Kain: Blood Omen 2
-Legacy of Kain: Defiance
-Legacy of Kain: Soul Reaver
-Legacy of Kain: Soul Reaver 2
-Legend of Kay: Anniversary
-Mark of the Ninja
-Metro 2033 Redux
-Metro: Last Light Redux
-Necropolis: Brutal Edition
-No Man's Sky
-Oddworld: Abe's Exoddus
-Oddworld: Abe's Oddysee
-Oddworld: Munch's Oddysee
-Oddworld: New ’n’ Tasty
-Oddworld: Stranger's Wrath HD
-Shadow Warrior 2 Deluxe
-Shovel Knight: Treasure Trove
-Skylar & Plux: Adventure On Clover Island

I could also buy stuff within reason, of course.

eyeofthetiger

Successful trades so far:
, [url=https://www.gog.com/forum/general/gogs_general_trading_thread/post15174]duk3nuk3m, , [url=https://www.gog.com/forum/general/gogs_general_trading_thread/post15191]ThePixelSamurai

Edit: Updated to add new keys. New in bold.

blackfeld: HAVE

Steam:

Ashes of the Singularity: Escalation
Aurion: Legacy of the Kori-Odan
F.E.A.R.
F.E.A.R. 2
F.E.A.R. 3
Goat Simulator: GOATY
Gotham City Impostors: Professional Kit
Layers of Fear: Masterpiece Edition
Legends of Eisenwald
LIMBO
Lord of the Rings Online, The: Steely Dawn
Maize
Mortal Kombat Kollection
ONE PIECE BURNING BLOOD
Walking Dead, The: Season One
War for the Overworld

WANT

GOG/Steam

80 Days
2064: Read Only Memories
Another World: 20th Anniversary Edition
Hollow Knight
Hyper Light Drifter
Legend of Kyrandia 1, 2, 3
Read Only Memories
Shovel Knight
Silence
Zak McKracken and the Alien Mindbenders

Pheace: Have

[GOG]
Celestian Tales Old North
Massive Chalice
S.T.A.L.K.E.R. Clear Sky
The Witcher 1 Enhanced Edition
Xenonauts

[Steam]
A Virus Named Tom
Bastion
Brütal Legend
Company of Heroes
Dead Space
FEZ
Grim Fandango Remastered
Legacy of Kain: Soul Reaver
Legacy of Kain: Soul Reaver 2
Mark of the Ninja
Psychonauts
Space Pirates and Zombies
Tomb Raider: Underworld
Trine 2: Complete Story

[Origin]
Burnout Paradise: The Ultimate Box
Command & Conquer: Red Alert 3 - Uprising
Crysis 2 Maximum Edition
Dead Space
Mirror's Edge
Populous

Want

[Steam]
Pillars of Eternity (Humble Monthly)
Rebel Galaxy (Humble Monthly)
Stellaris (Humble Monthly)
War for the Overworld (Humble Monthly)

blackfeld: blackcatXIII – thank you for the super smooth trade! :-)

wanderer_27: Thanks Blackfeld for the trade :)