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No mention of the 1983 Cotton Bowl win against Pitt? That was a great game. Cold, but great.

That said, the 1980 20-6 upset of the horns is my number one.

Not that this one was the greatest, but:

1994 SMU vs #7 Texas A&M at the Alamodome was probably the most unexpected score I have seen in my lifetime.

21-21 tie and we had a chance to get the W with a 43 yard FG kick that went wide right vs a team that finished the season undefeated. A team that hadn't lost a conference game in four years and was on a 26 game SWC win streak.

No other team scored more than 21 on that defense all year long. It was loaded with talent.

https://www.latimes.com/archives/la-xpm-1994-10-30-sp-56575-story.html

Greatest game or most hyped game? Best game SMU / Rice 1975. Arthur Whittington ran back a kickoff as clock expired. Bobby Leach miracle vs. Sand Aggies. Louie Kelcher manhandling top ranked Aggies in 1974. Most hyped game. SMU/TCU 1935.