I can't remember the last time I've played a computer game for this amount of time AND had that "I'll just do that before bed" feeling.
It's a very good game...though I'm super overprotective of my mercs and often restart a mission if I lose one (rather than just buy another).
Ammo is extremely low in game. I'm playing it on easy which I think is meant to have more abundant ammo. I've got a shit ton of rifles that fire 7.62 NATO and I can't get ammo anywhere. I have made some previously - but I don't have the stuff to make anymore.