A stealth game is a video game genre in which the players incarnate a hero who has to infiltrate a location very discretely in order to fulfill his missions. Generally, this type of game often implies a slow and thoughtful progress. The protagonist has to avoid being tracked down by the enemies present in the levels and to do so he can use many gadgets that will help him deceiving the attentiveness of the guards.

In the most difficult levels, the defensive and safety systems will be more difficult to avoid and the guards are often more intelligent and better armed. A lot of concentration and method is generally needed to succeed those very difficult missions.

Games representing this genre are the Metal Gear series (1987), the Tenchu series (1998), the Splinter Cell series (2002), the Forbiden Siren series (2003) and more recently the Assassin's Creed series (2007).