Atari 2600 - Bezerk

Battle against the robots in some distant future! Bezerk, for the Atari 2600 was a bit of a nightmare scenario, where the player is stuck in a maze battling robots, and being chased by an invincible bouncing smiley face robot.
There were different versions of the robots. There were apparently different versions of the game, with different versions of the robots. The game version we had only had four types of robots:

1. Malicious
2. Malicious and armed with some type of gun
3. Malicious and armed with two guns 
4. Bouncing and invincible 

Oh, and lest I forget, the walls of the maze were electrified. Our hero could only shoot one bullet at a time, so if he missed, he might not have another chance. Yikes!

One of the more memorable aspects of Bezerk was the stark and intense sounds effects of the game.