What’s the biggest game you’ve ever 100% complete?

[Majin-Tenshinhan]

I didn't time myself but I 100%ed Super Smash Bros. 4 and Super Smash Bros. Ultimate which may have taken a very long time, but the one I actually did time and remember was Red Dead Redemption 2 at 200 hours. Before that I remember my FFX 100% file was at 135 hours.