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I can give you something from this list for Audisurf:
Bunch of Heroes
Fortix 2
Hacker Evolution
Critical Mass
Making History: The Calm & the Storm
Beat Hazard
Razor2: Hidden Skies
Ironclads Collection
Humble Indie Bundle for Android 2 (Zen Bound 2, Cogs, Avadon: The Black Fortress, Snuggle Truck)
Have these. Link should be http://steamcommunity.com/id/KryptiqGhost/inventory/#753.
Looking for Audiosurf and Killing Floor.
Interested?
Some things here for audio surf? http://www.steamtrades.com/trade/GfVxV/hbe-mine-2-bundle-w-binding-of-isaac-audiosurf-others
Thanks!
Edit: these are all steam tradable