Your most regretful purchase from Steam?

Nation Red -.- just that bad

Lightfish.

If you want a Qix clone, try Fortix 2 instead...

Revenge of the Titans. I bought it for x-mas coal but it drained my life for days.And i did not get the coal :(

Hotel Giant 2. Just overcomplicated and way too messy from the outset for its own good XP

Arma 2: CO

terraria

DC Universe online, because it went free to play before I even got to play it.

TF2 and OFF TOPIC: I just thought about this and is it still considered pirating if I download a game to try it out and if I like it I buy it? Because if not I'll maybe start doing that to minimize my useless purchases.

AaAaAA!!! - A Reckless Disregard for Gravity
That's by far the ugliest scar I bear from the 2011 summer sale.

Plain sight...

From dust and STALKER Bundle.
I'm not made for scary games..

Witcher 2. I generally like rpgs but this one just wasn't fun for me.

secret of the magic crystals. Having issues with it,

ps, trackmania nations /= trackmania united. more cars, more tracks.

Teraria because i played for a week and became bored of it

probably any game that lands on a daily deal or is up to 90% off and looks ok or if its low enough like $2.50 i have a bad habit of buying it anyways. don't really know what held me back on Nexuiz this weekend lawl.

Delve Deeper. I bought it for a friend and myself before I realized it's multiplayer was limited to local. it wasn't very expensive, but that doesn't' stop me from regretting it!

Sword of the Stars 2....almost a year later and the game is still broken. ffs.

I guess it is a improvement considering the fact at the beginning you couldn't even get to the menu without a crash. but now a days it is hard to get past 20 planets without extreme lag or a crash.

Turba. Like what? Weird mechanics. And Beat Hazard. To think I got all it's dlcs too. Don't get me wrong, I love music games but these, nah.

Rainbow Six : Vegas 2, played it, finished it, and ended up didn't like it. The first one is much better IMO.

Full Spectrum Warrior complete for $10, never liked and never played

Brink

CreaVures, not sure if posted before

L.A Noire so i got the money back :D

shadow grounds

Gish... got it during summer sale, discounted and all, but still it's my worst purchase ever.