we have a 4 player, and 2 player version of the game, why not have a single player versions for 7k that uses the 2 player version gameplay (like shooting the scarab for example)
These machines arent for home use and arcades would preferably buy the 2 or 4 player machines over 1 player machines. Even though you can buy these for home use your technically not supposed to. Also pretty much nobody will shell out 7k for a 30minute halo game.