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...
Adventure Mode is even more difficult within Dwarf Fortress: I once had a fresh character start in a village and he died from blood loss while I was grinding levels by wrestling salmon in a nearby river, and it bit my characters toe off.