Your most regretful purchase from Steam?

Dungeon Defenders when I found out the money and items are client-sided loool...

Wargame European Escalation. Bought it for pull price, fml. Also: Deus EX HR, Dungeon Defenders

I regret buying everything on my library except Borderlands. I honestly don't believe I ever find the time to play all those crappy games I bought just because they were on sale :/

The Scourge Project for sure.

Far Cry 2. Worst voice acting in video games. Every time i hear any talking in game, a part of me ddies. Also, it's boring as hell.

Dead Rising 2 due to Games for Windows Live. The game itself is pretty entertaining. Dicking about with GfWL for 3 hours just to get the game to work is not.

Day of Defeat: Source. It should be called Weak Arm Simulator 2012.

Supreme Commander 2... but only because the very next day it went on sale for, like, 75% off.

Homefront. Good thing I got in a publisher pack together with other games that were good.
And Terraria so far, but I'll give it a second chance and try it again.

Warhammer 40k: Retribution.
It's not because of the game itself, but broken GFWL. I was planning to play it with my friend. However, we couldn't play because of GFWL.

PAYDAY: The heist

Call of Duty MW3. It's not that bad, but I just didnt get into it. I mean spent some hours in multiplayer and survival and singleplayer... but just got bored. Didn't try specops though (in mw2 completed them all and liked them), but I just dont want to install this game again. Maybe one day.

Red faction Guerrila. So i heard you like bad ports.

Most Indie Games.

Brink and Black Ops.

Black ops.. Worst 50$ i've spent

Mortal Kombat Kollection, Postal III, Killing Floor.

I'm alright with all of the titles in my library :D

I guess it'd be different if I bought 'em, since there's a fuckload of choice when you have the money, so you are bound to buy something and regret it..

payday and magicka :D magicka is nice but its bored me after 1hour of playing and my computer coulnd run the payday at all :DD

NyxQuest. It doesn't even run, so I was never able to play it. And the developer's don't seem to care, it's been abandoned for a while.

I'm torn between Dear Esther and Aion: Collector's Edition. Felt pretty stupid for throwing money at those.

battlefield bad company 2 worst game ever

Sonic The Hedgehog 4 Episode 1

Magicka is boooooooooooooooooring!!!!!

Bad Rats.