I have fond memories of this game. Robotron 2084 was one of the first 3 arcade machines my father purchased, used from a local arcade in Burton, Michigan. I don't think I'll ever rekindle the feeling of seeing real arcade machines in the living room. It was a real "Silver Spoons" moment for me.
Our Robotron machine died as a result of the cinder-block sized linear power supply which fried a rectifier and 2 ICs on the main board. Today I still play the game via MAME (solid blue label romset). My current high score is 4,515,850 on the default settings. I actually find the keyboard is far superior to the dual joysticks as they don't cause as much fatigue.