tl;dr: To request a key, you need to have the game on your wishlist prior to the creation of this thread (earlier than 11/11/15), or as specified by the contributor. Please specify the date you added the game to your wishlist when requesting.

It's somewhat of a letdown when you can't create a giveaway because the game was given for free at some point in time, but it doesn't mean the key is worthless. Some users may actually have the game on their wishlist and will appreciate getting it. The idea of this thread is to make good use of your ungiftable keys, by sending them to users who really want these games.

Note: If as a contributor you don't mind who gets the keys, there's another thread for key drops. If you do mind, this thread will help you find the right users. See guidelines for contributors toward the end of this post.

Requirements for requesting a key

All giveaways have the Basic requirements, unless stated otherwise. Some (typically the more worthy games) have the Higher requirements. Please make sure to read before requesting a key, and when you do, request it from the contributor directly and not as a comment to this post. The (request key) links below will help you find the relevant post.

Basic requirements

• Have the ungiftable game on your wishlist, and added earlier than 11/11/15 (or as specified by the contributor). Please specify date added to wishlist when requesting a key.
• Registered more than a month ago
• Untainted trade ratio. If you never trade it's fine too :-)
• Activated all games won; has no multiple wins of the same game. In other words, passes the Steamgifts tools tests.

Higher requirements

• All Basic requirements
• Level 2
• Created giveaways in the last month, at least some of which are public and were created prior to this thread
• Sent more games than won (or has Real CV Sent higher than Real CV Won)

Needless to say, once you get the key the only expectation is that you activate it on your account and say thanks :-)

Guidelines for contributors

Other members are invited to contribute their own ungiftable games. For easy navigation I'll add these giveaways to this post and will mark off (strikethrough) once you let me know that the key was sent (it would help if you also mark them off in your post). I hope I can keep it up without it becoming too much of a burden ;-)

• Please make sure to only list the game name, not the actual key. Including a link to the Steam store page is nice, as it makes it easier for people to check if they have the game on their wishlist.
• Feel free to specify a wishlist cutoff date other than 11/11/15 (the date of creation of this thread). A reasonable date to specify can be a day early than the date of your post, as users won't be able to add the game to their wishlist retroactively.
• If you want to add other restrictions, or to lax some of the ones I suggested, go for it. It’s your key after all. Just keep in mind that since you'll be the one delivering the key, you're also the one to enforce any requirements/restrictions.
• If the requester obviously didn't read the requirements, don't feel obligated to reply. It's a lot more fun to give to those who did bother to do their part :-)

Thank you all and good luck!

Giveaways

Note: 51 keys sent so far :-)

Mine:

• Nosferatu: The Wrath of Malachi
• Vertical Drop Heroes HD
• Frozen Hearth (+ key for Soundtrack+Artbook) Sent
• Battlepaths Sent
• Deponia Sent
• The Escapists - Alcatraz - no wishlist requirement, just own the The Escapists base game
• Euro Truck Simulator 2 - Higher requirements Sent
• Syberia Sent
• Dino D-Day Sent
• Lovely Planet Sent

Contributed:

• Contributed by Mari1 (request key) Note: Wishlist before 11/3/16 (DD/MM/YY)
  • Battlepaths
  • Vanguard Princess
• Contributed by NuxTenebrarum (request key) Note: Wishlist before 15/3/16 (DD/MM/YY)
  • Deponia
  • Knights and Merchants
  • Burgers
• Dead6hot - contributed by DeltaBladeX. Note: Wishlist before 13/3/16 (DD/MM/YY), request key by replying to this post
• Stealth Inc 2: A Game of Clones - contributed by talgaby (request key) Note: Special conditions apply. Read post before requesting. Sent
• Ravensword: Shadowlands - contributed by SubbyDew (request key)
• Contributed by Embuscadaverdad (request key)
  • 2x Commander - Conquest Of The Americas
  • 2x Gorky 17
  • 2x Knights and Merchants HD
  • Two Worlds 2 Sent
  • HITMAN 2: SILENT ASSASSIN Sent
• 2x Hitman 2: Silent Assassin - contributed by orono (request key). Sent
• Euro Truck Simulator 2 - contributed by Mertaan (request key) Sent
• Iron Storm - contributed by satsukirebel (request key) Sent
• Deponia - contributed by nightswallow22 (request key)
• Contributed by aurorable (request key). Note: Special conditions apply. Read post before requesting.
  • Murder Miners
  • Gun Monkeys
  • Afterfall Insanity - Dirty Arena Edition
  • Total War: SHOGUN 2 Collection
  • Napoleon: Total War Collection
  • Bionic Commando: Rearmed
• Contributed by Bullete (request key). Note: Wishlist before 11/12/15 (DD/MM/YY)
  • Deadbits (x2)
  • Super Killer Hornet Resurrection
  • My Lands: Miner's Luck - Starter DLC Pack
  • Into the war (x2)
  • Arena Cyber Evolution Skull pack DLC
  • Spoiler Alert
  • Royal Quest Welcome Pack DLC
  • Trackday Manager
  • Not The Robots (x2)
  • Brawlhalla
  • Block N Load - Platinum Bar Pack DLC
  • Kung Fu Strike - The Warrior's Rise Sent
  • Kung Fu Strike: The Warrior's Rise - Master Level DLC Sent
  • Particula
• Murder Miners - contributed by crywar144 (request key)
• Postal - contributed by d3m4n (request key) Sent
• Contributed by deadxobbit (request key)
  • Euro Truck Simulator 2 - Higher requirements Sent
  • Lovely Planet Sent
• Contributed by MaKiPL (request key)
  • KnightShift Sent
  • Enclave
  • Two worlds: Epic edition Sent
• Contributed by DIN123 (request key), delivery will be handled by me (Yirg)
  • Hyper Fighters
  • TeraBlaster
  • BlackShadows
  • Aveyond: Gates of Night
  • DogFighter
  • Eurofighter Typhoon
  • Desert Thunder
  • Steel & Steam: Episode 1
  • Litil Divil
  • Realms Of The Haunting
  • Why So Evil Sent
  • Why So Evil 2 Sent
  • Dead Bits Sent
  • Lucius Sent
  • Blood of Old Sent
  • Enemy Mind Sent
• Contributed by Annenouk (request key)
  • 3× 8 bits commando
  • 2x Dino D-Day (3 Sent)
  • 5x Knights and Merchants Historical version
  • 4x Weird Worlds return to Infinite Space (1 Sent)
  • 1x brilliant bob
  • 1x Cube Tractor
  • 1x Paticula
  • 1x PID
  • 1x Ruzh Delta
  • 2x Shadows on the Vatican act 1
  • 1x Skyborn
  • 2x Space Hack
  • 1x Vapour
• Divide by Sheep - contributed by madth3 (request key) Sent
• Hostile Waters: Antaeus Rising, contributed by yobh (request key):
• Dino D-Day (South America restricted) - Contributed by Emileon (request key)
• Contributed by thatsok9 (request key)
  • Gun Monkeys Sent
  • Vertical Drop Heroes HD
  • Space Hack
  • Battlepaths
  • Mechanic Escape
• Contributed by chakilgan (request key)
  • Anomaly Warzone Earth
  • Commando Jack
  • KnightShift
• Contributed by Dorugo (request key)
  • Anomaly: Warzone Earth
  • Anoxemia
  • Burgers
  • Dino D-Day Sent
  • Enclave
  • Enemy Mind
  • Nosferatu: The Wrath of Malachi
  • Orborun
  • Particula
  • Realms of the Haunting
  • Relic Hunters Zero
  • Steel & Steam: Episode 1
  • Super Distro
  • Vertical Drop Heroes HD
• Contributed by eeev (request key)
  • Royal Quest - Welcome Pack
  • Orborun
  • 8BitBoy
  • Steel & Steam: Episode 1
  • Earth 2150 - The Moon Project
  • Overcast - Walden and the Werewolf Sent
  • Hostile Waters: Antaeus Rising
  • The 39 Steps
  • Commander - Conquest Of The Americas
  • Dead Bits Sent
  • Vertical Drop Heroes HD
  • Ravensword: Shadowlands Sent
• Platypus II, contributed by Doshmaku (request key) Sent
• Contributed by OFFsteam (request key) Note: Special conditions apply. Read post before requesting.
  • Bionic Dues
  • Bloop
  • Canyon Capers
  • Chaos Domain
  • Dead Bits
  • Enclave
  • Enemy Mind
  • Litil Divil
  • Lovely Planet
  • Nosferatu: The Wrath of Malachi
  • Not The Robots Sent
  • Overcast - Walden and the Werewolf
  • Really Big Sky Sent
  • Royal Quest - Welcome Pack
  • Skyborn
  • Space Hack
  • Steel & Steam: Episode 1
  • The 39 Steps
  • The Culling Of The Cows
  • The Ship: Murder Party
  • Time Gentlemen, Please! and Ben There, Dan That! Special Edition Double Pack
  • Two Worlds Epic Edition
  • Vertical Drop Heroes HD
• Contributed by Daerphen (request key)
  • Anoxemia
  • Battlepaths
  • Canyon Capers
  • Enclave
  • Gun Monkeys | spawns additional copy
  • Litil Divil
  • Particula
  • Realms of the Haunting
  • Steel & Steam: Episode 1
  • Warhammer® 40,000: Dawn of War II: Retribution higher requirement Sent
  • Warhammer® 40,000: Dawn of War® - GOTY higher requirement
  • Euro Truck Simulator 2 higher requirement Sent
• Contributed by Ikkebott (request key) - No wishlist requirement + Level 1
  • Hyper Fighters
  • Glacier 3: The Meltdown
  • Nux
  • Hostile Waters: Antaeus Rising
  • Bloop
  • Litil Divil
  • Lucius Sent
  • Super Sanctum TD - gift copy Sent
  • Gun Monkeys - gift copy
• Contributed by olfox1 & delivered by keohookalani (request key) (additional requirement applies, please read the post by keohookalani before requesting)
  • Gaben The Final Decision Sent
  • Metrocide Sent
  • Tycoon City: New York Sent
  • Collisions Sent
  • HyperRogue Sent
  • Organ Biker Sent
  • In Exilium Sent
  • Reversi Sent
• Contributed by SubbyDew (request key) - both Basic requirements + Level 1
  • Mafia II Sent
  • Euro Truck Simulator 2 Sent
• Contributed by steffke (request key) - All Higher requirements
  • Bloodsports.TV
  • Blockstorm
  • Euro Truck Simulator 2
  • Grimoire: Manastorm
  • Hover: Revolt of Gamers
  • Secret Ponchos Sent
• Particula - contributed by cihs (request key)
• Skyborn - contributed by hiei05 (request key) - Higher requirements Sent
• Contributed by TokiMC (request key) - All Basic requirements + Level 2
  • Cobi Treasure Deluxe
  • Victim of Xen
  • Gun Monkeys
  • Gentlemen!