Forgot what made me think about this topic but I've been considering this for a week or two... Curious what you all think.
When I mean "hardest" "video game", I mean whatever game that you find objectively more difficult than all other ones on the market, as long as it's a video game. I guess exposure to different genres/types of games can influence the answer to this question a lot so... Hence I was curious about your rationale.
I have a pretty solid answer & rationale but I guess I shouldn't share that in the main post to bias results...
Toss up between RC Pro-Am and Ninja Gaiden on the NES. I beat them both and they were both a real bitch. So, so many times I got to the final race or stage and couldn't do it... so you start all over from the beginning.