These are all Steam keys, non tradable, you go first:
Secrets of Raetikon
Velocibox
Knights of Pen and Paper + 1 Edition
Great Permutator
PixelJunk Monsters Ultimate
Pulstar
Vangers
GTR Evolution
Dino D-Day
Dream Pinball 3D
SpaceChem
SpaceChem: 63 Corvi DLC
Sniper: Ghost Warrior Gold Edition
Clutch
99 Levels to Hell
Zombie Bowl-o-Rama
ARMA Tactics
ARMA: Cold War Assault
ARMA: Gold Edition
Air Forte
Alpha Prime
Aquaria
Atom Zombie Smasher
Avadon: The Black Fortress
Bastion
Batman™: Arkham Origins DLC
Botanicula
Bridge Constructor
Broken Sword 2
Broken Sword: Director's Cut
Brütal Legend
Carrier Command: Gaea Mission
Cave Story+
Cities in Motion 2
Closure
Cogs
Command & Conquer: Red Alert 3 - Uprising
Containment: The Zombie Puzzler
Crayon Physics Deluxe
Crusader Kings II
Crusader Kings II - African Unit Pack
Crusader Kings II - Norse Unit Pack
Crusader Kings II - Russian Unit Pack
Dead Space
Duke Nukem 3D: Megaton Edition
Dungeonland
Dwarfs!?
Eufloria
Europa Universalis 3 Complete
FEZ
Fish Fillets 2
Flotilla
Fractal
Galactic Civilizations II: Ultimate Edition
Gratuitous Space Battles Multiplayer Key
Guardians of Middle-earth: Smaug's Treasure DLC
Insanely Twisted Shadow Planet
Kingdom Rush
LIMBO
Legend of Grimrock
Leviathan: Warships
Machinarium
Magicka + 2 DLC
Mark of the Ninja
McPixel
Mirror's Edge
Nightsky
Oddworld: Abe's Oddysee®
Offspring
Fling
Orcs Must Die! 2: Complete Pack
Orcs Must Die! GOTY
Organ Trail: Director's Cut
PixelJunk Eden
Ravensword: Shadowlands
Receiver
Red Faction: Armageddon Path to War DLC
Sanctum 2
Sanctum: Collection
Savant - Ascent
Shadow Warrior Classic Redux
Shank 2
Shivah: Kosher Edition
Solar 2
Splice
Stealth Bastard Deluxe
Swords & Soldiers HD
Syder Arcade
Take On Helicopters
Tales From Space: Mutant Blobs Attack
The Binding of Isaac + Wrath of the Lamb DLC
The Lord of the Rings Online: Steely Dawn Starter Pack
The Showdown Effect
Thirty Flights of Loving
Tower of Guns
Type:Rider
Waking Mars
Warhammer 40,000: Dawn of War
Warlock
Zen Bound 2
These are all Steam keys, non tradable, you go first:
Secrets of Raetikon
Velocibox
Knights of Pen and Paper + 1 Edition
Great Permutator
PixelJunk Monsters Ultimate
Pulstar
Vangers
GTR Evolution
Dino D-Day
Dream Pinball 3D
SpaceChem
SpaceChem: 63 Corvi DLC
Sniper: Ghost Warrior Gold Edition
Clutch
99 Levels to Hell
Zombie Bowl-o-Rama
ARMA Tactics
ARMA: Cold War Assault
ARMA: Gold Edition
Air Forte
Alpha Prime
Aquaria
Atom Zombie Smasher
Avadon: The Black Fortress
Bastion
Batman™: Arkham Origins DLC
Botanicula
Bridge Constructor
Broken Sword 2
Broken Sword: Director's Cut
Brütal Legend
Carrier Command: Gaea Mission
Cave Story+
Cities in Motion 2
Closure
Cogs
Command & Conquer: Red Alert 3 - Uprising
Containment: The Zombie Puzzler
Crayon Physics Deluxe
Crusader Kings II
Crusader Kings II - African Unit Pack
Crusader Kings II - Norse Unit Pack
Crusader Kings II - Russian Unit Pack
Dead Space
Duke Nukem 3D: Megaton Edition
Dungeonland
Dwarfs!?
Eufloria
Europa Universalis 3 Complete
FEZ
Fish Fillets 2
Flotilla
Fractal
Galactic Civilizations II: Ultimate Edition
Gratuitous Space Battles Multiplayer Key
Guardians of Middle-earth: Smaug's Treasure DLC
Insanely Twisted Shadow Planet
Kingdom Rush
LIMBO
Legend of Grimrock
Leviathan: Warships
Machinarium
Magicka + 2 DLC
Mark of the Ninja
McPixel
Mirror's Edge
Nightsky
Oddworld: Abe's Oddysee®
Offspring
Fling
Orcs Must Die! 2: Complete Pack
Orcs Must Die! GOTY
Organ Trail: Director's Cut
PixelJunk Eden
Ravensword: Shadowlands
Receiver
Red Faction: Armageddon Path to War DLC
Sanctum 2
Sanctum: Collection
Savant - Ascent
Shadow Warrior Classic Redux
Shank 2
Shivah: Kosher Edition
Solar 2
Splice
Stealth Bastard Deluxe
Swords & Soldiers HD
Syder Arcade
Take On Helicopters
Tales From Space: Mutant Blobs Attack
The Binding of Isaac + Wrath of the Lamb DLC
The Lord of the Rings Online: Steely Dawn Starter Pack
The Showdown Effect
Thirty Flights of Loving
Tower of Guns
Type:Rider
Waking Mars
Warhammer 40,000: Dawn of War
Warlock
Zen Bound 2