Centipede was one of my favorites, along with Millipede. It was a truly sadistic game, forcing you to divide your attention between the centipede and the scorpions at the top of the screen and the spiders at the bottom. They were probably my favorite games that were originally made by Atari back then.
When I was a kid, I also saw an Armenian made knockoff of Centipede that ran on hacked Galaxian hardware. It had the look and sounds of Galaxian rather than Centipede, and there was even a scrolling starfield in the background as in Galaxian and Galaga. The mushrooms changed colors when you shot them instead of showing deterioration. It was called War of the Bugs, or Monsterous Manouvers in a Mushroom Maze. That's how it was spelled on the title screen. I even made a Youtube video and wrote a blog about it on Pixlbit.