Katamari - levels are on timer and you need to remember what to pick up.
Hidden & Dangerous 2 - 1-3 hits and you are dead.
Senran Kagura - normies hate fan service
Any RTS game from the past and a present - you won't see normies playing Dawn of war 1 even after SM2 that made WH40k even more mainstream or a Blitzkrieg/Sudden Strike or World in Conflict or Codename Panzer series or Call to Arms.
Parasite Eve 1 - Normies don't even remember it since they only know about boring classic RE games that are nowhere near as difficult as PE1 since you can avoid 95% of the fights
Kingdom Under Fire - normies hate metal, hate sexy girls and hate when ai is smarter than their tiny brains.
Colin Mcrae 1 up to 2005 - too hard for a normie plus they doesn't really support gamepads on pc, and they look like ass