Okay lets see here.

Spartan: Total Warrior - Medieval introduced me to the Total War series and Rome kept me playing the series. When I saw information and videos regarding their third person action game, I was pretty excited because at the time I was also interested in the Dynasty Warriors series and Spartan looked to provide fast combat where the enemies and allies would fight one another without the frame rate taking a dive all the time. While it delivered on those areas, it was still a rather boring game that put you in numerous narrow hallways and there were only a few spots with large scale fights between allies and enemies.

Dynasty Warrior games - Speaking of the series, I regret any Dynasty Warriors purchase I've made.

Final Fantasy X-2 - While it was a Christmas gift. I regret receiving it.

Prey - It wasn't a bad game, but I just don't think it was worth the $50 price tag. Shame PC games can't be rented.

Elder Scrolls 4: Oblivion: While I did spent lots of time with it and even put on a bunch of mods for extra quests, items and graphics my interest in the game just crumbled months after I began playing it. I have little to no interest in even touching the install disk anymore.

Far Cry - After a few years of hearing praise for the game, I decided I'd try it out and got it for a cheap price. Soon after I started playing I regretted that purchase. The graphics were impressive for their time (competition against Valve and ID's engines), but the boring story, terrible voice acting, and insane difficulty made the game unbearable. I made it a pretty decent way into the story before I just gave up and enabled developer mode so I could turn on invincibility so I could just finish the damn game.

Doom 3 and expansion - I returned something to Gamestop and figured I'd try out Doom 3 and the expansion with my new found store credit. I regretted that decision pretty quickly. I'm not too much of a horror fan, but the extreme monster closets and pitch black rooms were just too annoying to keep going. I ended up grabbing a mod so that the flashlight is always showing, but even then I could only get so far before I just gave up. I haven't even touched the expansion and the jewel case still has it's plastic wrap.

Dark Messiah: of Might and Magic - I understand nothing about the story and have little interest to keep playing. While I regret buying it, the fact that I bought it during Steam's holiday sale for only $5 was the saving grace. That $5 could have been better spent on Left4Dead on the day of the sale it dropped to $7.50.

Abe's Oddessy and Abe's Exoddus - Like Dark Messiah, I bought them during Steam's holiday sale for only $2.50 each so it wasn't a huge deal. However, so far I just haven't been able to bring myself to play them (though I did play a little bit of Abe's Oddessy on PS1 over the summer which was why I was interested in buying them from Steam) so I'm questioning if I should have tried to buy something else during that week of sales. Perhaps I'll start playing through them sometime.

I finished Dark Messiah with an invincibility cheat haha I couldn't stand the game but I had to finish it at least. the story is stupid too. hell, the game was annoying too, I regret it as well. but I think I bought it in a pack with other games.

Yea that's what I was doing. The ways it used the Source engine for physics and magic was pretty cool. However, the best part about using the Source engine was that I already knew how to turn on cheats and enable god mode and noclip.

1. Rogue Squadron III: Rebel Strike - I still have nightmares of seeing Wedge running around trying to shoot a blaster into walls.

2. Castlevania: Lament of Innocence - IGA was never meant to make a 3D game....Why did I trust him! Why!

3. Star Trek: Starfleet Academy - Worst...acting....EVER! And the game was pretty bad too.

4. Final Fantasy Tactics - When I played the game, I remember the game had very flawed AI and one of the most annoying set of characters I had ever encountered. It made me sad because I was very interested in the character customization system itself. But After over 60 hours of grinding and trying to fight with the game, I gave up on it. The story had little value to me and the AI would always just run away whenever it got any damage, only to turn around and focus on one of your teammates if you tried to chase after it. A very annoying system of baiting the computer to even fight you.

5. Suikoden IV & V - Yup....two games for the price of one. How could one amazing series go bad so quickly. Well...that's what happens when the creator leaves and two separate teams take over and try to take the series in two completely different paths at the same time.

6. Disgaea: Hour of Darkness - A game I bought purely for the hype. Turns out, I should have looked into it more first.

7. Pokemon Battle Revolution - This game was suppose to finally be the ultimate 3D Pokemon fighting experience. Well, considering its on this list, I think you can see how that turned out.

8. The Simpsons Game - I tried to like this game, I really did. I played every single level and I forced myself to try to find every in joke written in the script. I even completed the game..but alas, nothing. In the end, it was just another rushed, poorly developed mess from EA. The writing was funny, but EA cut funds and development time from the actual 'game'. And what should have been the ultimate 'Simpsons Game' is instead just a weak platformer with bad physics that's coated in good writing and yellow paint.

Star Wars the force unleashed: The controls were repetitive and the graphics were down right awfull (I hope Krome Studios will never make another major game for wii)

Yakuza 2
Perfect Dark Zero
Baroque
Cross Edge
Little Big Planet (just a tiny bit tho...)
Unlimited Saga (I believe that's what it was called...)

Edit: Also Final Fantasy Tactics A2. I think Disgaea spoiled me with its battle system so I found A2 pretty limited. Also, the game

pissed me off when they give me missions that require a certain item and they never give me the quest to obtain that item. it really pissed me off.

No one game in particular. I just regret getting too many AAA games at one time (Assassins Creed 2, Mass Effect 2, Final Fantasy 13, GTA Episodes, etc) because none of them are getting the attention that I want to give them.

I know what you mean. I have gotten like 7 games in the last 3 weeks. Mostly playin catch up. I like all the games I have gotten but over time I will play them with more focus. Another reason why I am not getting the new Pokeman remakes least not right now. Gotta catch them all right!! Really depends how the rest of the year goes to how focused I can be and at the moment it looks like my first half will be game after game

FIFA 94
first game I bought cause I had money left after all I wanted... barely even played it.

there have been others since, but this one stuck in my mind

- Metal Gear Solid 4 - It was terrible. Obviously have you have to have played previous MGS games to get the story, but even the gameplay wasn't that great.

- Call of Duty WaW - Played it a couple weeks, then went back to CoD4.

- Killzone 2 - I didn't like it that much, should have rented