Aliens have more enemies in Zeta Sector than we have spaceships. Prepare your ship and give a good fight to invaders!
Zeta Aggression Sector requires 48 parameters to be built.
40 Hyper Hydro
40 Hyper Jenta
40 Hyper Mali
20 Ultra Hydro, 10 Ultra Jenta and 5 Ultra Mali
20 Hyper Motron