It's the first video game I've ever played. I'm not sure was it Atari or some copy of it, but it had just one game in memory. It was a shooter with very basic graphics. Black and white, and you're the white stick shooting on other white sticks and shapes. Game is scrolling from left to right and it isn't Space Invaders, Asteroids etc. I was 3.5 years old, don't remember any other detail I'm afraid. I wasn't the one playing it, it was my older brother.
Feel free to post games you've played in your childhood but can't remember their names.