Date Of Manufacture: September 28, 1987
Model Number: 557
Common Abbreviations: BG
MPU: Williams System 11B
Type: Solid State Electronic (SS)
Production: 5,250 units (confirmed)
Specialty: Mechanical Backbox Animation
Notable Features: Flippers (4), Slingshots (2), 3-bank drop targets (2), Standup targets (13), Kick-out holes (3), Center Up-post, Left outlane kickback, Right outlane detour gate. Two catapults (kickers that propel ball airborne into habitrails). No pop bumpers. One standup target is behind each set of drop targets.
Design by: Mark Ritchie, Python Anghelo
Art by: Python Anghelo
Music by: Chris Granner
Sound by: Chris Granner, Brian Schmidt
Software by: Bill Pfutzenreuter
Notes: Williams began using System 11B during the production of "Big Guns", so this game can have either an 11A or 11B system board.