Most rare games you own on your Steam account?

well i could list all the removed games like everyone else, but I will just list one that hasn't been mentioned yet:

The movies stunts and effects (and the movies i guess)

maaaybe stalin vs. martians is more rare though

Thunder Wolves

Deadpool with the Merc with a Map Pack DLC

Planet of the Eyes.
Because im the only one that currently owns it because im testing the game before official release.
And i suppose some released yet not sold in store checkers game that u can actually still get for free somwhere.

I'd say fable III but 20 of my firends own it.

hm.. i have:

• counter strike source
• half-life 2

heard those were among the rarest games on steam

look up "irony" if you dont get it

GTA 1 and GTA 2

Flocker, only 2 of my friends have it =DD
and Lords of the Black Sun, only 1 friend have it :DD

The Dream Machine, Robin Hood: The Legend of Sherwood, Ballance :v

Full Pipe

It seems I have no friends owning The Body Changer

Disclaimer: That is my rarest games. It doesn't mean that it is a rare games.

Also I want to remember that Portal Stories: Mel is a nice free mod for Portal 2 owners (my friends don't seem very interested on it...)

EDIT: Actually Steam wasn't loading friend's info for some games, double checked, only one game survived :P

Mafia
FUEL
Motor Rock

and a bunch of other removed games

Fuel and Blur, I guess. Can't even be bought on Steam anymore.

Since most of my obscure stuff were bundled or bundled after I got them, I assume most hoarders have them somewhere. So maybe the rarest is among GTA1, GTA2, Mafia, and Chicken Shoot.
The rarest, but actually played from start to finish one is almost surely Chicken Shoot, or maybe Sinister City.

FUEL

Team Fortress 2

From the Depths and Universe Sandbox for me. Although they aren't exactly "rare".

Motor Rock
Cliver Barkers: Jericho

for me i'd say agent awesome,avencast,
carrier comand gaea mission
coffin dodgers
coldfire keep
crusader kings complete
gurumin a monstrous adventure
isomer
ionball,knightshift
nights into dreams
android assault cactus
painkiller resurection
painkiller redemption
only one with game, probably more but to lazy to check all xD i have lots of friends on steam some have quite a impressive library xD there might be some only i own but a few removed games like metro 2033 15 more of my friends have it but like i said to lazy to check full list of my games xD

Family feud and jojo's fashion show and American Mensa academy

I don't know how to see how many of my friends do not own this, but according to steam none of my 375 friends play these games.

The Talos Principle
King of Fighters XIII
King of Fighters 98
Homeworld Remastered Collection
Child of Light
A story about my uncle
Venetica
Biglands: A game made by kids
Realms of Haunting
Spy Chameleon - RGB Agent
Tetrobot and Co.
Nihilumbra
Puzzle Dimension
Back to Bed
Grimoire: Manastorm
Tengami
Commander: Conquest of the Americas Gold
Commando Jack
Cubetractor
East India Company Gold
Fearless Fantasy
Great Permutator
Huntsman - The Orphanage Halloween Edition
Ionball 2 : Ionstorm
Litil Divil
The Lost Crown
Majestic Nights
MirrorMoon EP
Necronomicon: The Dawning of Darkness
Nights into Dreams
Pirates of Black Cove Gold
Postmortem: one must die (Extended Cut)
Rusty Hearts
Cpace CHannel 5: Part 2
Still Life
Streets of Choice
Tesla Effect
Voxelized
Warrior Kings

Nothing on Steam is rare and can be gotten by anyone that wants it. The only rarity really exists in games that were removed from sale.

Ducktales Remastered, Knightmare Tower, and Harold.