Let's see...
In no particular order:
1. Dead Island - Hilarious case of bait-and-switch false advertising, buggy as all hell on launch, incredibly laggy during co-op, hilariously bad voice acting and equally terrible writing, incredibly bland melee combat (kick-kick-kick-kick-kick-kick-kick-STOMP! xINFINITY being more effective than pretty much any of it's ridiculously fragile melee weapons), you fight normal humans with guns for like a solid third of the game, the guns you get (even when used by the firearm specialist character) are mostly garbage with incredibly limited ammunition, and to top it all off it's incredibly short.
2. Brink - The supposedly huge amount of customization options for your character are a complete joke, the weapons in the game all feel like peashooters, the weapons in the game all feel very samey with very little distinction from one gun to the next within the same class, some of the character classes are incredibly powerful while others are practically worthless, there's only a small handful of maps, the multiplayer and the single player are the exact same game (except in single player your idiotic teammates are replaced by somehow-even-more-idiotic AI characters), the matchmaking barely worked, and it was laggy to the point of being almost unplayable at launch due to a flaw in the game for most players.
3. Max Payne 3 - Solid gameplay, but it lost most of the heart and soul of the series. Max stayed pretty true to his character, but everything else just felt... off. I loved the first two games, hell I've probably played through the first one a half dozen times... but this one I couldn't even bring myself to finish once.
4. Alone in the Dark - The recent-ish one. Holy crap was this game abysmal. The PC controls were fucked up to the point of being completely unplayable to me. I never got further than an hour into the game because I just couldn't stand the game. I've read that it was later patched to have more tolerable controls... but hell no, I'm not ever touching that game again. It was bad enough I really don't even think it's worth the second chance.
5. Champions Online - I bought this on release because I thought it was going to be like an upgraded City of Heroes. I played for about a month, then went back to City of Heroes. Its character creator was a mere shadow of the one City of Heroes had, its writing and story were laughably terrible (Why the fuck do the cops in the tutorial zone have to shoot at ME to test out their sweet new guns, when there are alien invaders attacking the city like twenty feet away from them?!), the different power sets were unbalanced as fuck, and the power sets were pretty much across-the-board getting constantly nerfed into the fucking ground due to PvP which at the time nobody gave a shit about (to the point where, regardless of powers, you really didn't feel particularly super since you could go from taking on an entire army of enemies one night, downloading a patch, then getting your ass handed to you by a street thug with a Glock the next night).
6. Every single Command & Conquer game released post-Red Alert 2 - Why do I keep buying these? WHY?!
7. & 8. The Witcher and The Witcher 2 - I bought these for cheap during the last Steam sale. I figured they were about as cheap as a couple cups of soda, so it's not like I was going to be out much. In retrospect, I wish I'd bought the soda. The combat systems in both games are unintuitive garbage, the setting feels pretty bland to me, and I honestly just wasn't impressed by anything, really. I bought these two games based upon their reputations and the hype that seems to be building for the third title. I won't be doing that again without a demo or prior research.
9. Deus Ex: Invisible War - Honestly, this isn't a terrible game... it's just a terrible Deus Ex game. They axed most of the role-playing features of the first game to make it more console-friendly for the original X-Box and PS2. The graphics were pretty wonky (anyone else really creeped out by the characters' dead-looking eyes and thousand-yard stares?). The environments are tiny and require very frequent loading screens. The story was pretty lackluster, and seemed to go WAY out of its way to drag in characters from the first game even if it made no sense for them to be there, sometimes not even behaving anything like the originals. The universal ammunition system was pretty terrible, too.
10. Fallout: Brotherhood of Steel - Not to be confused with Fallout Tactics: Brotherhood of Steel, since I actually kinda liked that one. Nah... this Brotherhood of Steel was a console-exclusive for the original X-Box and the PS2. It had awful gameplay, awful writing, awful voice acting, it completely threw out the dark humor that the rest of the series is well-known for, and it creates a plethora of plot holes and inconsistencies if you try to take it as canon. Thankfully, it isn't.
11. Diablo 3 - Another game, like Deus Ex: Invisible War, that's not terrible... it's just a terrible entry into its particular series. They story is a very special sort of dumb, the classes are incredibly unbalanced, Blizzard constantly nerfs particular specs into the ground making them more or less unplayable at higher difficulties without buffing up anything else, they constantly mess with the difficulty levels themselves, the auction house completely removes the scavenger hunt motivation for playing that the previous games had, the real-money auction house prevents them from doing anything to fix the economy because they want people buying digital items with real-world money (and is likely a factor in the constant nerfs so that people have to frequently re-gear their characters), and it's incredibly short. Also, it re-uses most of the environments from the previous games. Diablo 2's act I was the cathedral... so was D3's. Diablo 2's act II was a desert zone... so was the first half of D3's. Diablo 2's act 3 was a jungle zone... so was the second half of D3's. Diablo 2's act 3 was in Hell and it's act 4 was on Mount Arreat... D3's act 3 featured both of those, but in reverse order. /facepalm. The whole game just feels like a much prettier, but overall completely watered-down Diablo 2.
