Cities with populations over 5 million:

Megatron: 15 million
Goa: 12.5 million
Xevious: 10.8 million
Proximina: 9.5 million
Ageispolis: 8.2 million
Xtal: 7.9 million
Pulsetau: 7.3 million
Gigaruski: 5.9 million

Capitol: Megatron City