It's been awhile since I've played but I got around 20-25 hours. I really didn't want it to end. I may play it and Undead Nightmare again soon.

It's a
good
long though. I was still playing it on my 360 until last Friday when it finally became backward compatible on the XOne. The replayability of this game cannot be measured.
-Rod

Really long. It's a great game, but there were a lot of times where I was just waiting for it to end already.
The legend of the dog faced woman.

Believe me, you don't want this game to end.

About 15 hrs

These games are as long as you make them.
If you just stick to story missions and fast travel everywhere, you'll get through it in a couple of sittings.
If you want to do every mission, every side quest, play every game, unlock every costume , do every challenge hunting, etc, collect every weapon, get 100%, etcyou'll be at it for a while.
Plus then you can go through the rather amazing Undead Nightmare
And so, God came forth and proclaimed widescreen is the best.
Sony 16:9

Its longer than GTA 5. I don't remember how long it took me, but it seemed longer than most games, but not in a bad way. This is one of the best games I have played.
Trophy Case
Mr_French_Predator
http://tinypic.com/view.php?pic=etcjue&s=5