AI

Easy AIs

 * Entrenched Homeworlder: This AI has stronger defenses than normal. In addition, it holds captive human settlements that need to be rescued.  If captured, you get +45 metal and +45 crystal, but the AI makes stronger attacks. AI progress advances significantly if the settlements are destroyed or scrapped.
 * Fortress Baron: The AI has stronger defenses than normal, and has a heavily defended homeworld. It has access to the Superfortress.
 * Mine Enthusiast: The AI uses a larger quantity of mines than normal.
 * Sledge Hammer: The AI sends more waves than normal.
 * The Tank: The AI has reduced defenses, but sends larger than normal waves. it also starts with armored units.
 * Train Master: The AI has twice as many Astro Trains.
 * Turtle: The AI never attacks, but its planets are heavily defended.

Moderate AIs

 * Assassin: The AI targets the strongest player.
 * Backdoor Hacker: The AI starts with an Exo-Galaxy wormhold near each player's home command center.
 * Bully: The AI targets the weakest player.
 * Counter Spy: The AI has strong defense, and a Counter Spy defense that insta-kills cloaked ships.
 * Feeding Parasite: The AI specializes in parasite units, and frequently uses them in raids.
 * Mad Bomber: The AI has access to Bomber starships, and uses bombers in its attack waves.
 * Stealth Master: The AI has access to all cloaked ships, and uses them in its attack waves.
 * Teleporter Turtle: The AI never attacks, and places its focus on heavy defenses. It also specializes in teleporting ships.
 * Vicious Raider: The AI has access to raider units, and uses them in its attack waves.

Hard AIs

 * Attritioner: The AI's planets contain an attrition emitter, which slowly damages hostile ships within the system.
 * Scorched Earth: If the AI loses control of the planet, it will destroy all resources there.
 * Shadow Master: The AI has access to all cloaked ships. In addition, each of its planets has a Planetary Cloaker, allowing its units to remain cloaked even when firing or near hostile sensors.
 * Special Forces Captain: The AI has its regular guard posts replaces with special forces guard posts.

Tech AIs

 * Technologist Homeworlder: Same as Entrenched Homeworlder, except it uses more advanced ships.
 * Technologist Parasite: Same as Feeding Parasite, except it uses more advanced ships.
 * Technologist Raider: Same as Vicious Raider, except it uses more advanced ships.
 * Technologist Sledge: Same as Sledge Hammer, except it uses more advanced ships.
 * Technologist Turtle: Same as Turtle, except it uses more advanced ships.
 * The Core: Doesn't have as many ships, but they are all Mark V ships.