Suggestion: Monster Hunt or Item Hunt?

[Earthwingangel]

Is it possible to make the "win" factor a monster hunt or item hunt? Where you could beat the game by killing a certain monster or monsters, or by finding a certain item or items. You could give options for it to be random ones or switch it to certain ones and could even choose the "full" setting and the only way to win the game is to find and kill each type of monster at least once.

[adamdruppe]

If you just put aside a few bytes in memory and killing a monster were to bit shift and or the index in, you could keep track.... somewhat cheaply? I guess even squeezing in a few bytes wouldn't be necessarily easy but it would be cool.