Condemned? Ammo was extremely scarce in that game and you usually had to rely on melee combat and random makeshift weapons in the environment (pipes, locker doors, desk drawers, 2x4's, crowbars, axes, a papercutter, manequinn arm, etc).
I don't see how having less ammo somehow makes it "creative", it's the same exact concept as every other zombie/undead story. The world is fucked, you're one of the last survivors, scavenge for ammo and food/supplies, try to stay alive and make it to some safe zone or whatever.
I have faith in Naughty Dog and it will probably turn out to be a great game with likable characters, but it doesn't exactly win points for originality based on what they've shown so far.