Frontier is a Bally pinball machine (produced under the Bally name) released in November 1980. It is based on the mountain man and hunting theme.
The basic game play is to collect two separate bonuses. The Den of Predators are 5 rows of 3 animals, rolling over lanes A, B and C or hitting the left, center, or right stationary targets lights one animal in the left, center, or right columns respectively. Lighting a complete row of animals advances the "Frontier Bonus". Lighting all the animals advances the "Frontier Bonus" to 60,000 and the "Predator Bonus" to 45,000 and lights "Special".