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.
20 Hyper Hydro
20 Hyper Jenta
20 Hyper Mali
10 Ultra Hydro, 6 Ultra Jenta and 3 Ultra Mali
10 Hyper Motron