Williams made games for hard-core arcade gamers and this collection proves it.  Setting aside "Bubbles", a misguided effort to be cute, the collection is 2-D, testosterone-driven mayhem, with titles that gamers of  that era still revere: Defender, Stargate, Robotron, Sinistar, and Joust.  The emulation is perfect -- you can even view the operator statistics and  set the arcade's welcome message.  Only regret: this disc pre-dates the  Sony dual-shock analog controller, whose two joysticks would have been  *perfect* for Robotron.