([b]Disclaimer[/b]: Most of this is an idea based on an assumption which is based on speculation) Everyone knows the gameplay demo involved infinite ammunition so the team wouldn't be having any trouble on stage, and that that won't be a factor of the final game. Since you won't be scavenging weapons like you would in halo, I'd assume you'll have an ammo counter similar to borderlands: a certain amount of maximum ammo that you can carry for each type of gun. We also didn't see any sort of health indicator, which makes me worry we'll have some sort of regenerating health system. The thing with borderlands is that there are so many weapons that a lot of them feel weak most of the time until you finally run across one that really works well, but until then, you use the bad gun, and when you use the bad gun, you kill less efficiently, and when you kill less efficiently, you lose ammo. Then, you come across a gun that can kill better and ammo no longer becomes an issue. And then, there is the issue with your health and shields. so many of the skills and bonuses makes it where you never have to go to the medical vender to buy health, making them nearly pointless. i dont remember the last time i picked up a health vial in BL2. Both of these scenarios make combat dull, and I think bungie can improve on that. I was thinking that along with a merchant, or some sort of in game shop that allows you to buy ammo, you could run into crates to scavenge ammo and health packs as well. Borderlands did this, but you'd have to pick up every single magazine for each type of gun and every tiny little health vial, and it became a tedious, annoying, thumb numbing chore. Instead, maybe you could simply open the crate and have the items simply displayed on what you got a la Far Cry 3. Once you open the crate/chest/box/whatever, the simply tells you "gained 34 rifle ammo" or something like that. Also, make sure these crates are distributed evenly. Not too scarce, but not too overwhelming. In The Last of Us, around the end of the game, you'd have more ammo and med kits than you'd know what to do with, and killing became a no-brainier. No more strategy on how to approach a straggler, no more making sure every shot counts, no more worrying about how much health you'll lose in the fight. When you don't have to worry about these two things, exploration becomes pointless. This causes games to no longer have the need to include exploration, since they replenish on their own. Making us have to scavenge a shady looking building because we're low on health (that can't regenerate) and ammo (that cannot be replenished by walking over another gun of the same kind) will add to the experience, opening up possibilities of hard decision making, and encourage exploration, all while adding strategic challenge to enemy encounters that would otherwise be considered run n gun strategy in every encounter if you wouldn't need to worry about ammo. There's no point to go stealthy if you've got tons of ammo. There's no point to make a quick kill strategy if you're health is gonna regenerate after the fight. And there's no point to exploring if both of these aspects simply replenish themselves