Tradable:
Zombie Driver
Command & Conquer 3: Kane's Wrath
Chaser
A Valley Without Wind 1 & 2
Nexuiz
Dead Island (NA)
Sextion 8: Prejudice
Jet Set Radio
Rock of Ages
Left4Dead 2
Wanderlust
Keys:
Organ Trail Director's Cut
Broken Sword Director's Cut
Incredipede
Dead Island GOTY and Saints Row: The Third - The Full Package
Warhammer 40,000: Dawn of War
Awesomenauts
Hotline Miami
Aquaria
Fractal
Frozen Synapse
Waking Mars x2
Nightsky
Broken Sword: Director's Cut
Anomaly: Warzone Earth
Syberia 1
Avernum: The Second Trilogy
Dark Fall: Lost Souls
Tiny and Big in Grandpa's Leftovers
English Country Tune
Oil Rush
Cogs
Sword & Sworcery EP
Cave Story +
Offspring Fling
Indie Game: The Movie
Tradable:
Zombie Driver
Command & Conquer 3: Kane's Wrath
Chaser
A Valley Without Wind 1 & 2
Nexuiz
Dead Island (NA)
Sextion 8: Prejudice
Jet Set Radio
Rock of Ages
Left4Dead 2
Wanderlust
Keys:
Organ Trail Director's Cut
Broken Sword Director's Cut
Incredipede
Dead Island GOTY and Saints Row: The Third - The Full Package
Warhammer 40,000: Dawn of War
Awesomenauts
Hotline Miami
Aquaria
Fractal
Frozen Synapse
Waking Mars x2
Nightsky
Broken Sword: Director's Cut
Anomaly: Warzone Earth
Syberia 1
Avernum: The Second Trilogy
Dark Fall: Lost Souls
Tiny and Big in Grandpa's Leftovers
English Country Tune
Oil Rush
Cogs
Sword & Sworcery EP
Cave Story +
Offspring Fling
Indie Game: The Movie