Although "Homeworld 2" nominally has no difficulty setting, it features dynamic difficulty adjustments, in which the strength of a level's opposition is determined using the composition of the fleet the player enters the level with (the fleet remaining at the end of the previous level). This led to an exploit in which players "retired" all of their ships at the end of the previous level, reducing them to RUs, and entering the next level with a huge store of raw materials to use against a very weak enemy. The game also codifies the support caps introduced in "Homeworld", and explained in "", by placing overall limits on how many ships of each class the player may control at once.