A difficult game for several of the game consoles & computers to properly port...
http://www.youtube.com/watch?v=a9FDaHxVrCE (http://www.youtube.com/watch?v=a9FDaHxVrCE)
Zaxxon is a game that really suffered on a lot of the home platforms.
I remember playing the really good C64 version at my mates house as a kid while I only ever owned the iffy 2600 version.
Another mate of mine also had the 3D version for the Sega Master System which I remember being really cool with the glasses on.
Another fine game. I played the C64 version the most.
Not in this video but certainly relevent is the sequel for the Sega 32X - Zaxxon Motherbase 2000
http://www.youtube.com/watch?v=S0oU6u4cTbI (http://www.youtube.com/watch?v=S0oU6u4cTbI)