Been playing this for the past week now, and I am more frustrated than anything. It really is quite unclear and random tbh.
The whole weapon changing thing is awful. You cant just have a range of weapons and pick up ammo for them, you have to pick up each gun, check it for damage and ammo, unload it and drop it.
And when your gun runs out, you have to go into an inventry, choose another gun and pick it while being fired at! Then you realise it has no ammo either!
Scary though. o>