I beat Tears of the Kingdom without doing any main quests at all after getting to the surface, which I didn’t realize going in would mean beating it without the paraglider. It changes everything about how you approach movement and even a lot of the combat when you don’t have that crutch to lean on.
I accidentally created a speedster pacifist in Oblivion, building the crap out of my speed and acrobatics and neglecting the archery and stealth I had planned to specialize in so I just had to rush through dungeons stealing all the treasure and weaving between an ever-growing web of enemy attacks. By far the best Oblivion character I ever made.