Rise of the Colony puts you in the shoes of a colonial commander, charged with the defense of humanity's colonies across all its varied worlds. Build up your colony block by block, utilizing every trick in the arsenal to repel pillaging raiders and conquering aliens.
In battle, build weapons and blocks using your metal and fuel resources. Destroy enemies and construct mine/power blocks to gain more income. Research deadly new weapons and equip the ones you think you'll most need for the next mission.
And most importantly, don't let the colonists fall!