I experienced glitches, too...
*SPOILER INCOMING*
Where there were supposed to be two 3-headed dogs/hydras w/e sitting on top near the door in the Hades level, they weren't there. I was trapped basically and couldnt find what the hell to do because they wernt there... I was like wth am i supposed to do now i couldnt even get out of there so i looked at a youtube walkthrough of the level and there they were... damn dogs... so i had to start game all over since i tried restarting from checkpoint and they still wouldnt show. and similarly another time i couldnt R1 a white glow orb thing on Cronos but i restarted checkpoint and it worked.
kinda sucked... but wasnt that painful lol.







