LEGO 6894 Invader

6894 Invader is a Blacktron set released in 1987. It contains a spaceship, a small robot and a Blacktron astronaut.
The spaceship consists of three modules that can be detached and recombined: the cockpit section, the cargo container in the center and the propulsion section at the rear. The sections were also compatible with other Blacktron sets using the same interfaces, such as 6954 Renegade, 6941 Battrax or 6876 Alienator.

This is the only set with the black wall panel pieces printed with the Blacktron triangles. LEGO 40580