Teyon S.A. is a Polish video games developer, producer, and publisher. Founded in 2006, the company has two offices in Poland and one in Tokyo, Japan, with three development teams.

Terminator: Resistance is a 2019 first-person shooter game developed by Teyon and published by Reef Entertainment for PlayStation 4, Windows, and Xbox One. The game is based on the Terminator franchise, set during the original future war depicted in the films The Terminator and Terminator 2: Judgment Day. It was released in Europe on 15 November 2019. In the United States, the Windows version was released a day earlier through Steam, while the other versions released on 7 January 2020. An enhanced version of the game for PlayStation 5 was released on 30 April 2021. The same version was released for Xbox Series X/S on 27 October 2023. It received generally mixed reviews from critics.