There's also a white version of the game:
Ludotronic Envahisseurs 2 (1981, VFD, 4 C batteries, Model# 3213)
Licensed from Hanzawa, this game has been released as Actronics Twinvader or Twinvader III and by Radio Shack as Cosmic Fire Away 2000.
There's also a white version of the game:
Do I have this? Yes, brown version loose. (As well as Twinvader
III and Cosmic Fire Away 2000.)