The game crashes the first time you reach the first loading zone after the ceremony on every save, but starting the game back up, selecting continue, and then playing through the ceremony again makes it load properly the second time. Red Centaur challenge is unplayable, selecting it crashes the game (Experimental, 7.0, 6.3). Not sure if it's a Proton specific issue, but you can make the game hang by blocking between the coughing and the "press up to heal" prompt coming up. Had to Alt+F4.