Add zerg as new enemy force. It features Char as a new planet with new resources and new offensive mechanics. They can optionally spawn on "lore accurate" lava Vulcanus.
How to spawn overmind:
- Build PSI radar in army tab.
- Wait about 15 minutes for it to scan.
- Overmind will spawn once the scan is done and it's able to pick spawn location (location of other zerg unit spawners).
- Otherwise, PSI radar return to your inventory and retry in a different location.
