CGL Earth Invaders (19xx, VFD, 4 C Batteries, Model# ?)
Game similar to Coleco's Alien Attack, but with significant differences. To kill the Aliens, you have to dig a hole by holding the Dig button and a direction key for a few seconds. Then, when an Alien falls in the hole, you have about a second to start burying him (same way, but with the bury button). (In Coleco's Alien Attack, you just fire shots at the aliens, Earth Invaders is a lot harder). Also released by at least two other companies: Gakken in Japan as Heiankyo Alien, and Lindy as Alien. Game ends when all 3 of your lives are gone, after a period of about 13 minutes, or if you reach 10,000 points. Check out the Guts section to see the inside of this game.