Close
I can give you something from this list for Half-Life:
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)
Tradable The Ship 2-pack (including another copy of the game, so 2x Ship) + Magicka code
Offer here