Hardest games ever made.

i'd say jesus rpg trilogy - https://store.steampowered.com/app/449040/Jesus_Christ_RPG_Trilogy/

The Lion King

The Lion King is hard, but what most people don't know is that the developers made the game extremely difficult on purpose. Disney actually told the developers to make the game so difficult that people wouldn't be able to beat it during a rental period. The game came out when rental stores were immensely popular, and Disney didn't want people to get more than halfway through the game so that the chances of them buying it would be higher. The developers disagreed with Disney's decision, but went back and tweaked the levels to make things more difficult even though the game targeted a younger audience. A few developers would later apologize to fans for how hard the game is.

Real Life will NOT be counted in these answers so please, don't be that person.

Runescape in Ironman hardcore mode (or whatever they called it, the one where you can't trade and where death is permanent) is probably significantly harder than real life 👀

Super Monkey Ball for the Gamecube... hands down....

As a kid? Disney's Aladdin since I couldn't get past the stupid carpet ride level -.-.
Now as an adult, I would probably go with something like Dark Souls or Nioh since I suck at them XD.

I remember fondly Project I.G.I.: I'm going in. Hard as nails shooter with no saving in levels. A sniper hit you? Too bad so sad start all over again.

Hardest Harvest. ¯\_(ツ)_/¯
Definitely, the hardest game I've ever made.