Quote Originally Posted by Jeanne d'arc
arcade=unlimited ammo for missile weapons, no fatigue and almost no morale factors.
This mode gives unfair advantages to certain factions, most notably the Parthians, whose powerful and abundant cavalry will be unstoppeable as they never tire. It also makes things all the more difficult for the barbarian factions. Their lightly armoured troops will be peppered incessantly by the neverending arrowfire, and you can just forget about the warcry to boost morale or trying to scare the enemy with your night raiders.