Vigilance is a third-person shooter developed by Postlinear Entertainment and Any Channel and released by SegaSoft in 1998 for the PC.

The single player campaign followed eight agents working for the counter-terrorist organization SION (Special Intelligence Operations Network).

The game combines first and third person perspective,[3] allowing the player to control one of eight SION agents each with varied strengths and weaknesses.

[4] The developers intended to make stealth a major aspect of the game, designing certain areas to be too difficult for players to fight their way through.

While GameSpot complained largely on slow access times requiring heavy resources from computers, the gameplay was praised for large variety of weapons at the time and moderately sized levels; the game was given a final score of 5/10.