The Hardest Retro Games You've Ever Played.
Among mine:
Ninja Gaiden (NES). Infuriatingly impossible to complete. Constantly respawning enemies placed in insidious locations, and if you die in the final levels you're made to complete them again.
Super Mario Bros 2 (The Lost Levels). (NES). Like a bad fan hack of the oringinal SMB - cheap and difficult. Endless trial and error platforming that I could never bother to complete.
Punch Out (NES). Never had the patience to beat Super Macho Man and reach the final fighter Mr Dream (or Mike Tyson depending on which version).
Super Empire Strikes Back (SNES). Nah forget it...
Zombies Ate My Neighbours (SNES). 50 something levels and I always ran out of items towards the end.
Mega Man (NES). Being overly difficult and short is not a good thing. This game was lucky to receive a sequel and spawn an endless franchise.