Er, this will be quite a long list so bear with me here.
Championship Manager 01/02 - Playing as Bristol City I got them into contention at the top of the premiership in the 5th season. Was sat at the top of the league, 2 points ahead of 2nd place with a goal difference 4 better than them.
I would win the league if I won or if I drew but 2nd place won by 4 goals or less.
I was 2-0 up coming into extra time and 2nd place were also 2-0 up at the same point. In 3 minutes I conceded 2 goals and the team in 2nd scored 3 meaning that I lost the league.
Result - Keyboard chucked at monitor. Monitor knocked off desk and screen shattered when it hit the floor, keyboard broke.
Call of Duty 2 - Was having one of my best games ever, was on a kill streak of 23 and the record for my clan (over 120 active players at the time) was also 23. I chucked a nade round a corner where I knew there was one enemy, nade bounced off invisible wall (corner was shown as narrower than it was) and blew me up.
Result - I punched the top of my case so hard it broke 2 fingers, dented the top of my case, shook my hard drive loose which caused the disk to become loose and destroy itself.
Championship Manager 4 - Playing as Forest Green. I secured successive promotions to reach the premier league, finished 4th in my first season in the Prem thus qualifying for the champions league. Next season I reached the champions league final, playing Barcelona. 90th minute, me 1-0 up. 92nd minute, 1-1. 97th minute, I give away a penalty, 1-2 barcelona. Under normal circumstances I wouldn't be too annoyed by this BUT there were only meant to be 2 minutes of extra time.
Result - Threw mouse across room at wall. Mouse went straight through wall (the wall was pretty much made of paper) and broke a £55 mouse.
Uplink - Playing my longest ever savegame, had about 190 hours of play time put into it. Was hacking a small bank to get a bit of extra cash. It would usually be a very easy hack however about half way through my graphics drivers crashed resulting in my screen blacking out but the game still playing. About 60 seconds later the driver restarted and my screen came back up. I had failed the hack, been traced and my entire savegame was over as in Uplink once you get caught that is the end. 190 hours of play gone due to a crap graphics driver.
Result - Almost brand new 22 inch widescreen monitor punched. Big crack down middle of screen and no longer worked.
Football manager 2005 - Another longest savegame one. I was in season 2074/75, with about 220 hours of play time. Was saving the game when the power cut out. When the power came back on I tried to load the game only to find that the crash had corrupted the savegame. I had deleted my backups about 30 minutes before to clear up some hard drive space and was going to create a new savegame as soon as I had saved the game again.
Result - Disk taken out of drive, smashed into hundreds of tiny pieces. Hard drive taken out and smashed.
As you can tell, I used to have a bit of an anger problem however its not a problem now and the incident with FM2005 was the last one.