Here're some gifts that I don't need. You can have them all if you want:
Alien Breed 2
BIT.TRIP RUNNER
Breath of Death VII
Burn Zombie Burn!
Cthulhu Saves the World
Flight Control HD
Half-Life
Holiday Sale 2011 Gift: Half-Life 2: Episode One
Lucidity
Poker Night at the Inventory
Serious Sam Classic: First Edition
Serious Sam Classic: Second Edition
Takedown: Red Sabre
Trine Enchanted Edition
Zeno Clash

I also have some spare keys. Mostly from bundles:
1953 - KGB Unleashed
A Valley Without Wind 2
A.R.E.S. - Berzerker Suit DLC
Aaaaa! -- A Reckless Disregard for Gravity
Afterfall Insanity Extended Edition
Age of Empires 2 HD + Forgotten
AI War: Children of Neinzul
AI War: Fleet Command
AI War: Light of the Spire
AI War: The Zenith Remnant
Air Mech
Alien Breed 2
All Zombies Must Die
Alpha Prime
Altitude
Amnesia Fortnight 2012
Amnesia: A Machine For Pigs
Analogue: A Hate Story
Anomaly: Warzone Earth
Aquaria
Arma II
ARMA II: DayZ Mod
ARMA II: Operation Arrowhead
ARMA: Cold War Assault
ARMA: Gold Edition
Avadon: The Black Fortress
Avernum: The Great Trials Trilogy
Bad Rats
Batman: Arkham Asylum GOTY
Beast Boxing Turbo
Beat Hazard
Beat Hazard - iTunes DLC
Beat Hazard - Ultra DLC
Beat Hazard Ultra
Ben There, Dan That! and Time Gentlemen, Please!
Betrayer
Bientôt l'été
BIT.TRIP RUNNER
Blueberry Garden
Booster Trooper
Brainpipe: A Plunge to Inhumanity
Breath of Death VII
Broken Sword: Director's Cut
Brothers
Brütal Legend
Bunch of Heroes
Cargo Commander
Cargo! The Quest for Gravity
Chime
Chrome
Chrome SpecForce
Cities in Motion
Cloning Clyde
Cognition: Episode 2
Cogs
Commandos: Behind Enemy Lines
Commandos: Beyond the Call of Duty
Containment: The Zombie Puzzler
Cortex Command
Crayon Physics Deluxe
Critical Mass
Cryostasis
Cthulhu Saves the World
Cubemen
Cubetractor
Dark Fall: Lost Souls
Darksiders
Darksiders II
Darwinia
Darwinia Soundtrack
Data Jammers: FastForward
Dead Horde
Dear Esther
Death to Spies Gold
Death to Spies: Moment of Truth
DEFCON
DEFCON Soundtrack
Defense Grid: The Awakening
Defense Grid: The Awakening - Resurgence Map 1
Defense Grid: The Awakening - Resurgence Map 2
Defense Grid: The Awakening - Resurgence Map 3
Defense Grid: The Awakening - Resurgence Map 4
Delve Deeper
Delve Deeper + DLC
Depths of Fear :: Knossos
Dino D-Day
Doc Clock: The Toasted Sandwich of Time
Doorways: Chapters 1 & 2
Duke Nukem
Duke Nukem 2
Duke Nukem: Manhattan Project
Dungeon Defenders
Dungeon Defenders + DLCs
Dustforce
Dwarfs!?
EDGE
Eets
English Country Tune
Eschalon: Book I
Eschalon: Book II
Ether Vapor Remaster
Eufloria
eversion
EvilQuest
F.E.A.R.
F.E.A.R. 2: Project Origin
F.E.A.R. 3
Fable: The Lost Chapters
Fate of the World
Fate of the World - Denial
Fate of the World - Extras Pack
Fate of the World - Migration
FEZ
Fieldrunners
Forge Starter Pack
Fortix 2
Fractal
Frozen Synapse
FTL: Faster Than Light
Garshasp: The Monster Slayer
Gettysburg
Ghost Master
Giana Sisters: Twisted Dreams
Gish
Gratuitous Space Battles
Greed Corp
Greed: Black Border
Guacamelee! Gold Edition
Guardians of Graxia + Map Pack DLC
Gumboy Crazy Adventures
Hacker Evolution: Duality
Hacker Evolution: Untold
Hamilton's Great Adventure
Hammerfight
Hard Reset
Hearts of Iron III
Hero of the Kingdom
Hero Siege
HOARD
HOARD Complete Pack
Holy Avatar vs. Maidens of the Dead
Home
Home Sheep Home
Homefront
Hotline Miami
Humble Android Bundle (EDGE; Anomaly, Osmos)
Humble Android Bundle (Toki Tori)
Humble Android Bundle (World of Goo)
Humble Frozenbyte Bundle
Humble Indie Bundle 2
Humble Indie Bundle 3
Humble Indie Bundle 6 (Wizorb, BIT.TRIP.RUNNER, Gratuitous Space Battles, Jamestown)
Humble Introversion Bundle
Ignite
Indie Game: The Movie
inMomentum
Insanely Twisted Shadow Planet
Insecticide
Insecticide Ep. 1
Into the Dark: Ultimate Trash Edition
Intrusion 2
Iron Grip: Warlord
Jet Set Radio
Jolly Rover
Killing Floor Bundle
Knock-knock
Krater
Krater - Character DLC
Kung Fu Strike - The Warrior's Rise
Larva Mortus
Lead and Gold
Legendary
Lone Survivor: The Director's Cut
Machinarium
Madballs in Babo: Invasion
Mark of the Ninja
Mass Effect 2
Men of War
Men of War: Assault Squad
Men of War: Assault Squad GOTY
Men of War: Red Tide
Men of War: Vietnam
Metro 2033
Miner Wars 2081
Monaco: What's Yours Is Mine
Mortal Kombat Arcade Kollection
Mortal Kombat Kollection
Mount & Blade
MX vs ATV Reflex
NecroVision: Lost Company
Nightsky
Nuclear Dawn
Oddworld: Abe’s Oddysee + Exodus
Oddworld: Stranger's Wrath HD
Oil Rush
Osmos
Overcast - Walden and the Werewolf
Painkiller: Black Edition
Painkiller: Recurring Evil
Papo & Yo
Paranormal
Plain Sight
Post Apocalyptic Mayhem
Power of Defense
Project Aftermath
Puddle
Puzzle Agent 2
Puzzle Bots
Ravaged Zombie Apocalypse
Red Faction: Armageddon - Path to War
Red Faction: Guerrilla
Red Orchestra
Red Orchestra 2: Heroes of Stalingrad - GOTY
Red Orchestra: Ostfront 41-45
Reign: Conflict of Nations
Rhiannon: Curse of the Four Branches
Rig 'n' Roll
Robo Blitz
Rune Classic
Runespell: Overture
RUSH
S.T.A.L.K.E.R: Clear Sky
Sacraboar
Saira
Sam & Max: The Devil's Playhouse
Sang-Froid - Tales of Werewolves
Scratches: Directors Cut
Scribblenauts Unlimited
Section 8
Septerra Core: Legacy of the Creator
Sequence
Serious Sam 2
Serious Sam Double D
Serious Sam HD: The First Encounter
Serious Sam HD: The Second Encounter
Serious Sam: The First Encounter
Serious Sam: The Random Encounter
Serious Sam: The Second Encounter
Shadowgrounds
Shank 2
Shattered Haven
Shattered Haven
Sid Meier's Civilization III: Complete
Sid Meier's Civilization IV: The Complete Edition
Snapshot
Snuggle Truck
Sol Survivor
Solar 2
Sonic 3 & Knuckles
Sonic 3D Blast
Sonic Adventure DX
Sonic CD
Sonic Generations
Sonic Generations Casino Night DLC
Sonic Spinball
Sonic the Hedgehog
Sonic the Hedgehog 2
Sonic the Hedgehog 4 Episode 1
Sonic the Hedgehog 4 Episode 2
Space Pirates and Zombies
SpaceChem
Spirits
Stealth Bastard Deluxe
Stellar Impact
Strike Suit Zero
Strong Bad's Cool Game for Attractive People
Sugar Cube: Bittersweet Factory
Superbrothers: Sword & Sworcery EP
Surgeon Simulator 2013
Swords & Soldiers HD
The Baconing
The Ball
The Basement Collection
The Binding of Isaac
The Journey Down: Chapter 1
The Maw
The Path
The Ship
The Void
The Whispered World
Tidalis
Tiny and Big in Grandpa's Leftovers
Titan Quest
To the Moon
Toki Tori
Toki Tori
Toki Tori 2+
Trainz Simulator 12
Trapped Dead
Trine
Trine 2: Complete Story
Tropico 4
Tropico Trilogy
Twin Sector
Two Brothers
Two Worlds II
UFO: Afterlight
Unmechanical
Uplink
Vertex Dispenser
Victoria II
Viscera Cleanup Detail: Santa's Rampage
Viscera Cleanup Detail: Shadow Warrior
Waking Mars
Warlock - Master of the Arcane
White Noise Online
Worms Blast
Worms Crazy Golf
Worms Pinball
X-Blades
XIII Century
Xotic
YOU DON'T KNOW JACK Classic Pack
Your Doodles Are Bugged!
Zen Bound 2
Zeno Clash
Zombie Bowl-o-Rama
Zombie Driver Apocalypse Pack
Zombie Driver HD
Zombie Driver Soundtrack
Zombie Shooter
Zombie Shooter 2