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Tripwire Interactive Bundle :P

Cave Story+

fortix xD

Deus Ex Collection maybe.

so far I'd say Far Cry 3

Orcs Must Die! or Portal Bundle - can't choose.
Both not on this site.

Civ 5, CoH:OF, I've plugged more than 100 hours into Civ 5 and i didn't even remember entering for it

dota 2

i havent gotten to most of my wins yet due to bandwidth cap

Mount & Blade Collection

Have not won anything here yet but won Valve Complete Pack during Steam's Christmas promotion years ago which was the best thing I've ever won.

Sonic Generations.

none yet :( fuck my luck :(

FarCry 3 it was, at New Years eve. Thought it was Santa's gift to me.

Bioshock Infinite.

Surprisingly, Fortix.

borderland 2 :D

Nice of you to qualify this with "and/or really wanted" because otherwise I would just have said that I can't answer without playing the games. Of the three games I won the one I really wanted to win was HL2 Ep2, because that's what I was missing from the series. It's also the one I'm least likely to play, because I haven't even gotten far into HL2, and probably won't play it again any time soon. The only one I did start playing was Deponia, and it seemed like an okay game, but not much more than that (then again, I'm just at the beginning).

Borderlands GOTY.

Tomb Raider! Thanks Mew :3

Gun Monkeys! :D

Fortix

Bioshock Infinite

Portal 2 =)

bf3

Th Quake collection