I am talking about the video games which were actually very good but happen to have this insane difficulty level that you have to actually practise it a number of times to clear a level
I can remember two titles at the top of my head, both belonging to Sega Mega Drive
I was able to finish Comix Zone, but I used cheats (invincibility) ... without cheats, it was even difficult for me to clear the first level ... secondly the game had a number of frustrating glitches as well and it freezes at a number of places.
The Adventures of Batman and Robin was frustrating as hell, coz I tried to play that game when I was in fourth grade and I had no clue whatsoever how to play it... I gave it another shot when I was in the seventh grade, and with the help of my cousin ... we were actually able to finish the game. Even though it took us around two weeks of nearly continuous play and it was frustrating as hell, but it pushed me towards playing it solo as well and now I can finish the game pretty easily.