Unfortunately, I wasn't able to get rid of unit upgrade buildings, as it appeared that they were specialized for producing the essence needed to make particular units. Without them, one couldn't produce more than overlords, drones, and queens.

With that in mind, I first decided to create a ranking system that would determine the size of the individual ground and flight zerg units. Ling, Lisk, and Lord, with Ling being the smallest, Lisk being mid-range, and Lord being the largest.

Instead of having a baseline unit for each type, from which unique types would be upgraded to(like how you upgrade banelings from zerglings), I decided that each unit would be grown individually.

For Ling ground units, I went with the Bladeling, the Gattaling, and the Baneling:

For the Bladeling, I gave them appropriately sized kaiser blades, which would sit horizontally from the Bladeling's body, instead of hanging over their head like a Zergling's blades. I gave the Bladeling two upgrades, stealth and speed. Things like armor upgrades were standard for all zerg units, so I didn't have to make a special upgrade for armor for them.

For the Gattalings, I gave them special appendages which hung over their heads that could shoot spines like Hydralisks could. They also had three upgrades, Spine production rate increase, shooting range increase, and explosive spines, which were spines that had a small amount of corrosive bile in them.

Banelings were pretty much the same, but I replaced their normal acid with corrosive bile, as that stuff did more damage.

For Lisk ground units, I went with Gattalisk and the Bilelisk, both of which were basically built from Roaches and Ravagers. The Gattalisk was basically a Roach that shot spines instead of acid, and the Bilelisk was basically a Ravager. The biggest difference was that they now had Drone-like locomotion, allowing them to move from place to place more smoothly and quickly than the Roach or Ravager previously could. Their upgrades were basically the same as what the old Roachs had.

For Lord ground units, I went with the Bladelord, and the Bilelord.

The Bladelord was basically an Ultralisk with a new name, but the Bilelord was new. The Bilelord looked like a huge scorpion, with with a long tail that hung over their heads, which could shoot huge amounts of corrosive bile, very long distances.

The Bladelord had the same upgrades as the Ultralisk, but the Bilelord had upgrades to range, shooting speed, and amount of bile per shot.

For Ling air units, I decided to use the Locust as the baseline, and got rid of swarm hosts altogether.

The two air ling units I created were the Dakkaling and the Glaiveling. Unlike the Locust, neither the Dakkaling nor the Glaiveling needed to land on the ground to attack, and they lived as long as normal units did.

The Dakkaling shot spines like the Gattaling and Gattalisk did, and the Glaiveling shot miniaturized Glaive Wurms. The Dakkaling had upgrades to spine production rate, shooting range, and explosive spines. The Glaivelings had no major upgrades.

The Lisk air units were a bit more difficult to design, as the only examples of mid-ranged zerg air units were the Mutalisks and the Corruptors, neither of which I particularly liked. The Mutalisks where basically worms with wings attached, and Corruptors were glorified ticks.

The air units I came up with were basically scaled up versions of the Ling units, The Dakkalisk and Glavelisk, and they had similar upgrades. I also made the Banelisk, which could drop packets of corrosive bile. They were basically fast flying bombers.

For Lord Air units, I kept the Broodlord, but it could be created on its own, instead of having to be made from a Corruptor. I also created the Scourgelord and Banelord. The Scourgelord could create live Scourge like the Broodlord make Broodlings, and the Banelord could make Banelings. They all had unit production rate upgrades, and flight speed upgrades.

For Spell casting units, I made the infestor flight capable, and since the Viper was already flight capable I didn't need to worry about that. I also changed the Overseer so that it could be created on its own, instead of having to be made from an Overlord. I gave the Overseer the new name of Observer.

I made a mental note to make a unit that was focused on Psionics in the future, after I had done some experiments in that regard.

In addition to individual units, I decided to make some changes to how units were controlled. The old Overmind's policy of TOTAL CONTROL didn't really sit well with me, as it was the current Overlords could only control about a thousand units before they had to hand off control to another Overlord.

I didn't want TOTAL DOMINATION, I wanted cooperation, I wanted my units to be able to think and cooperate with each other, so with that in mind, I redesigned the hive network so that instead of only being connected to their individual Overlord, the Zerg units could also connect to each other, and share neural resources, like the Geth from Mass Effect.

I also redesigned the Overlords as well. They now resembled the Leviathans from Mass Effect as well, but were much smaller, at only 500 hundred meters in height. Smaller than Leviathans I mean, not traditional Overlords.

Additionally, I changed the way the Hive connection worked, with the Overlord only having to exert complete control over a unit once, after which the unit would imprint upon the Overlord, obeying it's every command without the Overlord having to waste mental resources controlling them. My new Overlords could now control 100,000 units at a time.

To transport units from place to place, I recreated the Gonarch from Half Life, but much bigger, an individual Gonarch was able to carry up to 100 Bladelords, and could fly.

I also made a unit that looked like a giant floating starfish called the Scourge Mother, which was meant to act as an orbital defense platform, protecting the Hive Cluster from orbital attack, not that I expected the wraith to find me out here. Still, it pays to be prepared.

Satisfied with all of my changes for now, I withdrew from the Evolution Chamber and gave the order for one of the new Overlords to be grown.