There’s a really great list of Fallout 3 glitches over at Bitmob, which is totally worth checking out.
I’ve come across a few in my 70+ hours of gameplay, but the one that bothers me the most is probably not even a glitch in glitch-terms. It has something to do with the physics engine. Anyways, whenever I re-enter a room in which I shot up some robots or Super Mutants, they always reappear and then crumble to the floor, scaring the living the daylights out of me. Even now when I expect it, the sound of bodies thumping to the ground makes me jump. I don’t really get why it happens…
I’ve also experienced a Deathclaw being sucked into the sky, over and over and over. Fun to watch for a bit. Until, y’know, it lands on you.
Got any favorites glitches?