Chaos Strikes Back finished in 10 minutes and 37 seconds (seriously!)
Dungeon Master 40 minutes
Oh No More Lemmings
Lemmings 2: The Tribes
EOB 1, 2
Dune II, Harkonnen, Artredies
Wonderboy In Monster Land
Probably some others i cant remember. Someone actually clocked SWIV without cheating? that game is impossible.
Almost did Bubble Bobble 2: Rainbow Islands, Bubble Bobble got up to the last level.