Your most regretful purchase from Steam?

Tomb Raider Underworld!

Kinda regret getting Grotesque Tactics (and that was pre-bundle, mind you, at full price on release). Humor was kinda "meh" at best, dialogue and translation (by the feel of it) seemed like an afterthought and the protagonist and his first "follower" were so unlikable I had to take breaks every time a major cutscene kicked in.

Kinda killed my "impulse buying", "on release" and "parody genre" purchases :P.

Orion:beatdown 4 pack

me and my friend bought it
2 friends couldnt play it (had odd crash)
1 friend couldnt find servers

and me - the only one who could find servers and join but its a lame game

NEXIUZ it just doesnt work((( Allways crashing at lauch.

Kingdoms of Amalur. I got the Preorder for 60 and its 20 on Gamersgate now. Oh well. Atleast I don't have to use Origin and I got... hats. :PPP

Darkspore. First, DAMN PATCHES, then you need an damn EA Account. Then, ofcourse, shitty gameplay which dissapointed me. And strawberry on top of the cake: I BOUGTH IT AT FULL PRICE (49,99€ at my country) :@

nba2k11 for 20.09 fuck me worst purchase ever

Heroes of Annihilated Empires. Payed full price for it.

Stupid, stupid, stupid me...

EYE Divine Cybermancy. My word that game is terrible.

MW3 or Black Ops

DiRT Showdown or Mafia III, but thats just because I paid so much for them

My killing floor doesn't work, so I guess I regret that aswell

ARMA 2 CO as a gift for a friend when DayZ came out, he played it for few hours moaned the whole time and not played it in months I so hate him :D

Gotham City İmpostors because of f..kin GFWL

None. I would totally regret Dear Esther if I was silly enough to buy it after playing the dumb HL2 mod.

Terraria for $5

Wanderlust... Man I wanted to love that game but the controls are horrid and UI is just as bad.
Then you turn controller support on and half the shit you have to press you can only access from the keyboard.

On a more positive note, Indie Game: The Movie was one of my favorite purchases. The commentary with the guys from Meat Boy had me laughing my ass off.

"Dinner Date." How that won an award I will never know. The description is deceptive making it sound like you have some sort of influence at all. It's just a half hour of you listening to a douch bag whine about his sucky life while you control if/when he taps his fingers on the table, thats it. Every play-through is identical, you are not his subconscious your a nervous tick.

Bioshock

Fan of System Shock and Deus Ex, I got hyped like never before.. Pre ordered the game on Steam. I'm usually the patient kind of guy who waits a few months before getting a game, the time for the price to drop and honest reviews to come up, but not that time.

The gameplay simply felt dull to me. Not sure how this game got to be the highest rated game on metacritics..

Borderlands. Crappier-fps-ever.

Half life 2 :

Bought it just because of the mod "No room in hell"
and i dont know how to activate it lol..

Saints Row 2, though I bought it with 2 TF2 keys from a trader. Lags like hell and crashes alot.

The indie brain bundle from steam... way back when, with big brain wolf.

Never played any of it, and I didn't realize I had such low funds on my account that I couldn't pay for gas afterwards. I felt so stupid for buying a pack that would "make me smarter".

L.A. Noire.
The game is not bad, but I didn't like it that much. I'm happy that I bought it during the sale and not on the release day as I actually planned.

well my new most regretful purchase is just cause 2. luckily i got it on sale, HOWEVER im still running xp and didnt realize that it was vista/7 only

Dungeon Defenders.