How long did it take for you to finish the game on your first walkthough?

[ＳｐａｃｅＤａｄｄｙ]

I'm curious! I've been loving the game so far

[thrive]

around 20h, maybe a bit more. normal difficulty, not old school mode.

[ad]

15 hours or so. Did not find all treasures/secrets etc.

[Sternes]

I'd say around 20h for myself withouth all treasures and secrets