Released: June, 1982
Hercules was developed by Arcade Engineering (a company consisting of past Allied Leisure employees) and had the mechanisms from a Bally table, according to an interview with a designer.
Hercules was a pinball machine of herculean proportions. The ball was somewhere between a baseball and a softball in size. It took two coins to operate and gave you sounds and effects befitting its name.
SOURCE: Internet Pinball Database, Arcade Museum