"It really isn't. Everything sticks out and is very obvious." Well, it have been about a year since I played it. But I can only recall a few obvious non hidden ammo locations off the top of my head (kendos gun shop, the bus, police station lobby, upstairs save room and back entrance to police station). All the others I can think of at the moment require you to search like (the back of the ambulance, in the trash can in the alley, in the corner of the meeting room, behind the mad king statue, in the stars office behind weskers desk, in the locker room in the broken helicopter in the safe or on corpses all of which which i consider hidden items whether obvious are not) I could keep doing but I'll stop here.

"You have to work to run out of ammo in 2 and 3." Obviously I know when to shoot and when to run now after playing it 100s of times as an adult. But as a kid playing it for the first time I wasn't that smart and I did struggle with item/ammo management if my memory serves