Jaz Rignall//Editor USGamer:
To be honest, my all-time favorite arcade machine is Robotron 2084 - Williams' classic twin-stick shooter that kicked off the genre in stunning style back in 1982. It lacks any pretensions, and simply presents the bare bones of a shooter: just you, the enemies and bonuses to pick up. No backdrops. No power-ups. No bosses. Yet while being very simple in concept, it's extremely challenging and highly addictive.