MULE was a gigantic hit for me and my friends back in the late 80's as we tried to cram four people around our Commodore 64 keyboard to play. We must have spent hundreds of hours playing this game and I always wondered why it was never remade (short of an NES version I think?) or updated. Flash forward twenty plus years and we now have Planet M.U.L.E. for Windows, MAC, and Linux.