A stealth game is a type of video game in which the player primarily uses "stealth" to avoid or overcome oppenents. Games in the genre typically allow the player to remain undetected by hiding, sneaking, or using disguises. Some games allow the player to choose between a stealthy approach or directly attacking antagonists, but rewarding the player for greater use of stealth. The genre has employed espionage, counter-terrorism, and rogue themes, with protagonists who are special forces operatives, special agents, spies, thieves, ninjas, or assassins. Some games have also combined stealth elements with other genres, such as first-person shooters and platformers.