Worst game purchases you've made?

I have 2000+ games in my library. And something like 95% haven't been played. So I guess I regret all the ones I bought but will never play?

Killing Floor. I got it from a bundle, true, but...GOD, is it shit? No exaggeration, it's one of the worst game I've ever played, right up there with You Are Empty and Hellforces.

Another purchase I deeply regret is X-Blades. I somehow got my hands on a 90% discount coupon for it and I already owned its sequel Blades of Time, which I quite enjoyed playing(it was like a perfect blend between Prince of Persia and Tomb Raider), so I said "why the hell not?" But when I got to playing it, I realized that even the measly 1.5 euro I payed for it was too much. It's probably the biggest case in which a sequel in a series is so much better than the original(something which happens extremely rarely).

Got some more: Orion Dino Horde, Dino D-Day, Counter Strike: Global Offensive, Chivalry Medieval Warfare, Takedown Red Sabre, Guilty Gear Isuka, Payday The Heist. I could go on, but I won't...but I could.

CoD Black Ops upon release since I enjoyed MW2 so much. Multiplayer was such a letdown to me but the campaign has been ok.

l4d2... paying full price

I bought it for I think 50 cents, but it just makes me mad looking at it, Future Wars.

When i found a real awesome cheap indie game on some retailer sites and after the cheking realized that the game was DRM FREE instead of STEAM =S

PRE-ORDERING DEFIANCE ! havn't even played it yet ! (not on steam but it's the worst one, so ...) :p

Bought some games at full price that didn't really live up to the expectations, recently
Borderlands Pre-sequel
Civ Beyond Earth. (both on launch day)

But the one game I really really regret, and seriously want my money back is Luna: Shattered Hearts.
Sold as finished game, not beta or 'in developement' or anything, it's full of bugs, nothing really works. The dev's answer to every 'how do I' question is: "you can't" and yet, worst, when confronted with all the bugs, and asked by a huge ammount of buyers to fix please, his answer is: "Part 1 is done and good as is, I'm working on the sequel and have no time".... blegh. Was only like $2.50, but worst purchase ever.

the bundle

i love the tropico series, i enjoyed them all. but i regret buying every game cuz i bought them all for like 40 bucks, when if i would have waited a year i could have just bought them all for like 10 bucks instead

No regrets my friend.

Arma 3 for me, 40€ for a bug ridden game, the controls are clunky and it's one of the worst optimisation I ever saw, I played some with a Arma fan friend but most of the game were "hiking simulator" and "getting shot in the back simulator"

Rise of the Argonauts, it has MAJOR performance issues on PC

Probably Revenge of the Titans and Bastion because like 1 week later they were in a bundle :(

Worst games I ever bought: McPixel and Blade Symphony
I also made a mistake a while back when I bought Zeno Clash and the next day it appeared somewhere totally free...

Rogue Legacy.

Many people love it, but for some reason I just can't get myself to enjoy playing it. (I've tried several times, maybe I just haven't tried long enough. There's still hope.)

Please help me love this game.

I regret buying anything that became bundled b4 i played it :)

Dungeon siege collection.

Fallout New Vegas.

Fallout 1 and 2 were masterpieces of art that I enjoyed A LOT, but New Vegas is just TES in a wasteland, and it's not even close to the fun you get in a TES game.

Clive Barker Jericho because it costed 5 bucks. (I think that game is not on steam anymore)
Battlefield Bad Company 2 for 20 bucks, I guess. I lost interest in competition (I mean the multiplayer games. The single player of Bad Company 2 was nothing special to me).

Magical Drop V

The Cave Pre-Order, is was expensive from me at the time of purchase, I didn't won my TF2 Hat and the game is just bulshit