since i first beat ceaseless discharge many many years ago dodging his arm slam and attacking it over and over, i've always just done the "trick" method of killing him because it's much faster and not tedious unlike fighting him "legit". he's never been a highlight after the first time, so i prefer to get it over with asap.
i actually had the worst bug happen to me when i was at the very last area on my first playthrough of the remastered version.
got invaded by a darkmoon blade. i won, of course, but as i was making my way down the spiral staircase to the boss door, the sound cue for beating a boss suddenly played. ending cutscene started, credits, then i'm in ng+. if that had happened to me on my actual first time playing the game, i would have been livid! never encountered that glitch in the five times i beat the original on ps3.
what sucked even more was that i did all of the dlc right before that happened, so the save i had uploaded to the cloud was the one before i started the dlc. i just started a new character instead.
another minor glitch is when you invade someone in anor londo and that player makes it to
the optional boss
, you'll get the trophy for it if you haven't done it in your own world.
also, you only need to get up to ng++ to platinum the game! not too hard, actually. i got it on ps3 so i don't think i'll be doing it again for the remaster.