This is a fun, beautiful, very varied game. I'm only on Act 1, Chapter 3, but I've already gone through several very different locales and all sorts of different combat and action scenarios.
Yeah, the story isn't Eastbound & Down levels of heartfelt drama, but it's pretty engaging. So far it's been really good at giving you different reasons to move your ass. Lots of ticking clocks.
On Normal at least, though, I find myself running out of ammo more than I'd like to, and yes, I'm picking up some from guns. But not enough. It took me a while to buy upgrades because I had to keep spending points on ammo.
Overall though, this game is a total blast and very hard to put down.
I haven't touched multiplayer yet.