Based on 'Cat & Mouse' and in particular 'The Rare Ulfsark' from Age of Mythology.
Survive for 20 minutes while Arnold's forces (controlled by a human) are renewed with generally more powerful units each time.
To aid your survival, you have two coureurs and select home city shipments are available. You will begin in Age V irrelevant of the selected starting age in the game channel.
Everyone but player 8 should be on the same team. To play with less than 8 players, use computers for any player except P8.
It is likely not possible to win against Arnold with less than 3 players (i.e. 4 in total) but I haven't tested it with other people yet, so it may well be doable.