Syphon Filter is a 1999 third-person shooter video game developed by Eidetic and published by Sony Computer Entertainment for the PlayStation. 989 Studios released the game in North America. It is the first installment in the Syphon Filter franchise. The plot centers on special agents Gabriel "Gabe" Logan and Lian Xing who are tasked by the United States government to apprehend a German international terrorist.

Development on Syphon Filter began with the intention of creating a new "super-spy" genre hybrid that contained elements of stealth-action and puzzle solving. The game was almost cancelled several times during development as Eidetic faced many difficulties due to their inexperience in creating video games. Despite the initial drawbacks faced, Syphon Filter was met with critical acclaim upon release, with most praise directed at its innovative gameplay and immersive plot.