Please note: I am NOT referring to making a pay-to-win style of game or other such things. I despise games like that. The question is relatively simple: How exactly would I make it so the player could purchase additional content for a game? I'm assuming the purchasing option would need to be included in the base game if I ever imported them to Android or IPhone like a regular app, but would it handle like normal DLC from Steam? If you're wondering what sort of things would be purchasable, I'd likely just make cosmetics for the characters or other such things.