Since 1988 I have been to probably 160 home games. The loudest in my humble opinion were the 1992 AFC championship game as mentioned by the op, there was a game either 1997-1998 against Miami where it was unbelievably loud. Miami got out to a lead, Moulds went off, Flutie had a great day. Jimmy Johnson complained about the crowd noise after the game saying it was the loudest he has ever heard a stadium. I believe it was Flute's first year here & then of course the Monday night Dallas game was off the hook, perfect storm, Columbus day weekend, first Monday night game at home in year, Cowboys in town, temps that day were in the low 80s, everything came together that night except of course a win.
I agree with this, I was at the comeback, & it was crazy but noway it was the loudest.