Players earn points during the first half of the game for picking up terrabots and having cards left in hand. During the second half, players score for deploying satellites and for meeting targets set at the start of the game, e.g. having a city with eight tiles in it, having a city of each letter, emptying a level on your spaceship, having a certain number of shields, etc.
Once all the spaceships are empty, players score their final points for how well they've developed each city and their shields in comparison with their fellow terraformers. Whoever scores the most points wins.