Just wanted to know what games ya'll have played but then were unable to beat due to a game-breaking glitch.

For me it has been quite a few...
? Fallout 3, fast traveled right before the whole entering the Citadel thing to sell some stuff. Then did a side quest. When I traveled back to finish the main quest, I found I had broken my game.
? Darksiders: II, encountered a glitch where I couldn't get a door open because of an NPC.
? Mass Effect 3, a cutscene wouldn't trigger. Wouldn't work no matter how many resets I did.
? Borderlands, broke a main quest.

Except Darksiders II, I did make another character and beat the game. Still svcked to lose lots of hours due to a game breaking glitch.

Dungeon Siege 2, you attack a dragon in one level, but if you save and quit during the battle the dragon dissapears when you reload the game.

Fable 3, literally the LAST bridge you cross in the game (about 50 metres from the final boss), I got knocked off and glitched through the invisible walls into the river below with no way up. And of course, since that game had no proper save feature nor menus (thanks Peter), the game autosaved with me stuck down there, literally about 2 minutes from finishing the game.

So I just watched the ending on Youtube, and never touched the blasted game ever again.

40-50 hours into Dragon Warrior VII (Dragon Quest VII) on the PS1 something wouldn't trigger so I couldn't continue the game. I never gave the game a second chance and started over from the beginning, but I guess I might if it's re-released for the 3DS outside of Japan. But then again, maybe not, compared to DQ4, DQ5 and DQ8 it was kinda weak.

Here's a fun story that happened to my brother-in-law. Once upon a time, there was a playable demo on the Playstation 1 for a game called Lunar: Silver Star Story Complete. It was fairly lengthy, had a save game feature, and best of all, allowed you to import your save into the main game so you could continue the adventure from where you left off. The main character, Alex, carried an ocarina in his inventory. Its function? Doesn't have one, at least not in the demo. Not wanting it to take up valuable space that would be better suited for healing items, my bro moved it to the party inventory, where you can store excess items at the cost of not accessing them in battle. From there on, he forgot all about it and went on his merry way.

So he completed the demo, got the full game when it came out, and played through it. He laughed, he cried, he beat the [censored] out of that arrogant snot, Nash, blazed through the final dungeon, and reduced the final boss to a bloody smear on the floor. Then, he advanced forward to his final destination.

Now, here's the thing. There's one last puzzle to complete in Lunar: SSSC before the game can officially end; you need to play the ocarina before ascending the grand staircase. Otherwise, Alex will get zapped by lightning and die. In the full game, the ocarina cannot be moved at all; it always remains in Alex's inventory just so this scene can be done. This is its purpose, the reason why you carry it with you from the very beginning. But that wasn't the case in the demo. If you remove it from Alex in the demo and transfer that save into the full game, then you'll end up permanently gluing the instrument into the party inventory, where it can't be used.

So my brother-in-law had just reached the very last part of a 50-hour game, only to realize that there was absolutely no way in hell he would ever be able to win it. All because of some careless programming and a seemingly innocuous action done about 45 hours ago.

I fell through the floor of an aircraft in crash twinsanity, and ended up at the start of the game after 10 hours of playing it.

I've actually heard of that happening .

As for me my infamous Video Game Graphic Glitch Gremlin came at the end of Tom Clancy's Ghost Recon Advance Warfighter. Now this game is tough but I managed to solider on and got to the end or second to last ending level. The level opened up with you having to capture a terrorist leader but the building is guarded by two tanks. Now the VGGGG decided to make my tank driver drunk and suicidal as he keep getting stuck in an allay or he kept killing himself and you need this tank to destroy the other two tanks in order for you to get by. Well that glitch broke the game and I couldn't beat the second to last level----what pisses me off is that in the last mission you had an anti-tank soldier and you didn't need him but in this crucial mission they don't give you one---I'm like "what the hell man" .

Only one really comes to mind.... http://cdn.wikimg.net/strategywiki/images/thumb/3/36/Hydlide_NES_box.jpg/250px-Hydlide_NES_box.jpg on the NES.
I swear every time I got to a certain area, it just broke itself and combat stopped working. (not that it ever really worked)

It was a pretty bad game anyways.... AVGN did a review of it.

I guess I'm lucky, as I don't understand how people break so many games I have never had any real problems with any game since I was a youngster on Atari, Colecovision and a few NES games.

I saw that AVGN episode. Hydlide also ripped off the Indiana Jones theme .

Lego Star wars. 1 of the things that needs to be built to get through a certain level was bugged and I couldn't build it. I checked youtube to see if I was doing something wrong. I wasn't doing anything wrong.

Prince of Persia 2: The Warrior Within.

This game glitched on me multiple times. The first time playing the game, I got to the first teleporter that travels you back in time right after getting the first sword. Well I saved the game and quit, then came back to it and reloaded my file. My character was the Sand Wraith (if anyone knows what this is, your character becomes the sand wraith near the end game) and had no idea what was going on, thought it was all normal. Went the only way I could go, which entailed killing guys that took like 50 hits to kill, as I was using the first sword in the game, and at this point in the game you should have the second last sword.

Eventually i'd get to a part where I couldn't continue on and after hours of looking up online, I find out that im near the end game (despite only having like an hour of play) and I had to break open a wall with the lion sword (which I didn't have, I only had the first sword still) and was impossible to continue on in any way.

So despite that first hiccup, I started a new game and everything went all normal all the way until I got to the final boss fighting the empress of time or whatever. I got to that cutscene where you throw her into the portal, and then you're supposed to follow her through the portal and fight her for the last battle (this is if you didn't go the dahaka way). Well I got the cutscene, and then it gave me control to move my guy and follow her through the portal, except for some reason the portal never worked no matter what I did. Even if I quit and reloaded the game, I would be right at the portal with no way to go back or forward as the portal didn't work, thus my game was broken again.

I finally went through the game a third time, this time doing the dahaka ending (which is the harder one to get) and finally beat the game, though to this day ive never beat the game with the normal ending.

Couldn't beat Mass Effect 1 on Insanity or whatever the highest difficulty was because it wouldn't unlock - and I finished the game on each difficulty just to be safe but nothing unlocked it.