What is the best ga you've won

This War of Mine

Lots of good games, but what I enjoy the most right now is Dragon's Dogma: Dark Arisen.. :3

BioShock Infinite - Season Pass from CG-tron ♥♥♥

Borderlands Pre Sequel <3

Lot of choices but surely the best is Alien: Isolation.
The bad part is that my current PC is old and i can't play it.damn you dx11 :'(

I'm hesitant to make a "best" judgement, but the SG win I've put the most hours into has been, oddly enough, Bejeweled 3.

My most unlikely win was Firewatch, with well over 2000 entries.

X-COM: Terror From the Deep

almost everygame i won was on my wishlist :P, so almost everyone of them. Except those who were 5k copies or 10k or whatever.

Borderland: The Prequel.

Seems like I mainly win games I just dump points on, because I have to use them somewhere lol.
But there's at least one game that I just won a day ago, Xotic, which looks like a really fun FPS game.
The kind of stuff that I like.
I noticed it was available in some bundle, so I would've probably gotten it anyways, if I didn't win.
I will surely give it a go soon.

Clannad

I can't tell which is the best. I didn't have the time to play all of the game I won. But so far I enjoy Victor Vran

I'll have to go with XCOM: Enemy Unknown Complete Pack

For pure enjoyment, Little Inferno. I had a lovely time playing that one. Very charming and bursting with novel ideas.
In terms of amazement in having won, the 3D Realms Anthology. So many classic games, especially Rise of the Triad, Duke Nukem 3D and Shadow Warrior.
Finally in terms of exciting potential that I don't fully understand, Half Life 2. I'm led to believe that somewhere hidden on Steam is a list of free games that use and require this or another Source engine game in your library to use, but I don't know where it is and haven't found it yet. But now, if I do find those games, I can play them. Which is nice.

Europa Universalis 4, over a thousand hours played though I am not sure of how much exactly since Steam doesn't track it accurately when you aren't online.

I guess the best game i've won would be Arkham Origins.

It was my first win: L.A. Noir