Planetary Annihilation Gameplay Summary:

Another Planetary Annihilation special game mode, Spawn Wars! All metal spots are contained within the spawns, so the only way to expand your economy is to kill one of your opponents!

To achieve this game type, set your metal density to 200 and all metal spots will be within the spawn.

Planetary Annihilation Lessons, Tips, and Tricks (spoilers)

Getting to Advanced first still makes for king of the planet.

Rush to advanced, get an advanced economy. Use T2 units, win.