The problem here is that the two campaigns are identical as far as the missions and story are concerned. The only differences are the unit types available for each side. While this difference allows players to explore slightly different strategies as they replay the game, nearly everything else is identical. This makes the 16 missions a little light for the single player gaming dollar. These can be scattered anywhere around the three dimensional map.
Players use their resource collectors and resource controllers to speed along the operation.
The AI in Homeworld deserves credit. It can be fairly challenging and rarely every does anything bonehead stupid. Even more encouraging, unlike many of its RTS peers, the friendly AI does an admirable job. Disappointingly, a few important elements were left unaddressed in the final release. It seems with battles that have the potential to get as big as they do in this game, there should be an auto-repair feature.