Atari XE Game System (Score 1)

Oh, yes, that's right. My first computer came with a light gun! From Atari's original press release about the XEGS:

The cartridge for the XE game system can store over 256 Kilobytes of program, which is twice as great as any other comparable system, [Michael] Katz added. Atari is also selling a disk drive for players who prefer desk- based software. More on the XEGS and entire news release.

That light gun is my only comfort, though, since no one ever bought me a disk drive to go with it, so I was unable to save any of my programs. I have very few memories of the games played on that system, but many, many memories of staying up late and typing away to create some game or screen effect. It lit some weird joy in me that I relive today doing the "dance of joy" when a web site comes out just perfectly on more than one OS, browser and/or display. ;)