Callister Inc is a gaming company based in the United States. It features in the episode USS Callister.
The company was founded by James Walton and Robert Daly, who occupy the positions of CEO and Chief Technical Officer, respectivley. It is named after the USS Callister, the flagship spacecraft in the television series Space Fleet.
The main product produced by the company is the immersive online game Infinity, of which the base code was created primarily by Daly.
It is the second gaming company to feature in the series, with the other being SaitoGemu.