Shark! Shark!

Shark! Shark! for the Mattel Intellivision is an amazing game.  It's simple and fun, and keeps you coming back for more. 

The game is basically the modern game Feeding Frenzy, but it came out in the early 1980's.  You eat small fish to become bigger, and occasionally a shark comes to eat you.  If you bite the shark's tail enough, it will die, and you get another life.

You can also play 2 players simultaneously and it's a lot of fun. 

It's pretty simple, so there's not much to say, but it's a great game.