hmm, when I was a child, zelda "links awakening" was tough as hell, because we didn't figure out that you could push the stone in the worm palace so we searched the other available places for an item we may had missed or so x)
or in "ocarina of time" in the deku tree, we didn't figure out that we could climb the vines like a ladder.
(or in "majoras mask" being faster than the postman, which I later found out is impossible)
hmm, nowadays... I don't play that many games... And those I do (like minecraft, battle realms, some for gba emulator, some for n64 emulator, lol) are not that hard, hmm.
Maybe LoL, if I've to say one, while choosing support champ and others ignore and take support too, so we got like 4 support, 1adc, and almost all solo lane or failing at jungling
Or I take Braum and 2 tanks go top, 2 adc/apc mid and I go bot alone vs Ashe and Leona.