If no breaks are a pre requisite, no toilet breaks or anything then 8 hours on the MGS5 bosses when the helicopter crashes, the . I know cause I started profusely sweating cause I was so immersed in the game that I forgot to piss. They weren't even difficult just annoying to fight and you had to chase them down over a small map. Really frustrating. After that probably about 6 hours on the true Owl boss in Hirata estate in Sekiro, now that was difficult, I had already spent hours on him in the days before but I said I'm not budging until I beat him, took about 6 hours.







