Star Trigon is a spin-off Mr. Driller game developed by Namco.
In Star Trigon, players assume the role of Wataru Hoshi, Chuta Bigbang, or Susumu Hori spinning around a planet, having to rescue the uchujins (also known as Space Undergrounders) in time before their air supply runs out. Games in this series have been released for iPod, Windows, and iPhone in addition to the arcade versions.
After a character and stage is selected the player has to save multiple uchujins from aimlessly drifting through outer space by hopping from planet to planet to form triangles, it is saved if the player manages to contain an uchujin within a triangle. The player will be awarded in-game pickups to increase score and air packets to increase air supply. Star Trigon is simple in only requiring one button, the challenge is timing the jumps from planet to planet and rescuing uchujins before the air supply is depleted and as your characters are spinning faster and faster without jumping off screen. Along the way new obstacles will help complicate things and add to the challenge of the game like black holes and flares.
Although not released in North America, players first experienced this game on iOS devices in the Autumn of 2008. As of 2011, links to download the game for iOS are no longer available. In 2011, Namco retconned this game as a part of the United Galaxy Space Force series, an effort to combine all of the company's sci-fi game franchises into one long continuity.
The main character in the game. Most people call him "Star Trigon" because of his blue and white theme. He has adequate air supply, lowest speed, and high acceleration.
The main character from Mr. Driller. He has the lowest air supply, moderate speed and slowest acceleration.
Wataru's friend. He has the largest air supply, slow initial speed but with highest acceleration. Many adults say that he is their favorite character.
Susumu's father from Dig Dug. Called Dig Dug in the iOS and Windows versions. No one knows his air supply, however his movement speed is reversed; he has the fastest starting movement speed and gradually slows down.