Star Gate for Famicom was released on September 24, 1987 in Japan.
Differences from the arcade version :
- Losing all humans will NOT result in the destruction of the planet and turning all remaining Landers into Mutants. Instead, you will just not get any bonus points at the completion of a wave. Humans are still fully restored after every five waves, though.
- Pods do not explode into Swarmers.
- Bombers do not lay any mines.
- All aliens must be destroyed to complete each wave.
"Defender II [Model NES-SB-USA]