Why don't mpthey make skyrim multiplayer I mean like who doesn't wanna kill dragons with your little sister
Because it's extremely time consuming to take a game that was made for single player only and make it multiplayer. It'd have to be recoded from the ground up with multiplayer support, quests would need to be rewritten, enemy spawns and dungeons rebalanced, loot rebalanced, and how do you handle interiors?
Too much time and too much expense required.