as ur into games, I wondered if ud come across anything like that? I thought of that 20 years ago! would also be interesting to program it...
ok, how do you make a knife? well, we need a sharp edge... so the first knives were made of stone, but not any stone... then u discover some stones melt and then harden... some can make pots and spoons, some are crap for knives, but some are good... u still dont have the concept of a metal, just that some stones change properties when heated... a primitive alchemy is born... anyway lol

then some psycho thinks a knife is a better way of killing someone rather than as a craft or tool. and so the world churns.