[hvdgtxse] Reducing a multiplayer game to 2 players

A multiplayer game can easily be reduced to a 2 player game by having each physical player operate multiple player roles in the game.  If any one of your player roles wins, you win.

It helps if there is no imperfect information (hidden information), but not strictly necessary.

Of course, it changes the nature of the game a lot, with player roles collaborating.