Picked up a couple oldies: Tunnel Runner and Battlezone for 2600. I have never played TR before, and it is pretty amazing from what it can do with the hardware. The sound is especially awesome and ominous.
Battlezone isn't a particularly good game, but this was one of my first 2600 game we bought when I came to US. I pretty much played this game for probably a couple of years. The muscle memory came back immediately and got a pretty high score. Graphics is pretty horrible and Robot Tank (Activision) outclass it.
Bookmarks