I had an idea of a zombie game with some RPG elements (Bare with me)
Not a levelling system but things like wearing a trench coat will mean you get less damage and can carry more items, but it also slows you down and you get tired more easy meaning you have to eat more regular to keep up stamina.
You will need to scavenge food and ammo to keep yourself alive but both can be heavy so it will affect speed etc. I also liked the whole Medical system in MGS3, so those items would be needed etc.
Another idea I had for something like this was the character becoming more used to a way of fighting such as using guns often will mean he?s/her hands get steady and using melee weapons will increase its speed, running can also factor in the persons fitness and mean the more you run and move the faster you can climb things and increase stamina.
