Zerg
Work through the levels in order, or start wherever you like.
What it costs
Up nextThe minerals and gas for every unit and building, and how much supply your supply buildings give.
Create an account to keep your scores.
Numbers are from StarCraft II's own data, read from the game at patch 5.0.14 and brought up to 5.0.17 from Blizzard's patch notes. Times are at Faster speed, as ladder games are played.
Changed since 5.0.14: Spire (150/150 and 66 seconds, from 200/200 and 71); Viking (125/75, from 150/75); Ghost (2 supply and Light, from 3 supply; 5.0.16 made it 3 again for a few weeks, and its second hotfix put it back to 2)