The former company Eidos Interactive that published video games of the likes of Commandos, Tomb Raider or Gexx and was later absorbed by Square Enix released a first-person shooter called Project IGI (Project I'm Going In) back in 2000.
Penetrate into the enemy base to fulfill your mission
It's a shooter in which we have to penetrate into an enemy base to steal documents about a nuclear warhead and rescue our colleague while we're at it. As we mentioned above, the game is developed in first-person and combines sequences of pure action and others that require more strategy, such as when we need to use the sniper aim or interact with other characters that will help us during different moments of the game.
Due to its successful sales figures, three years later IGI 2: Covert Strike was released. However, you have to bear in mind that that was a long time ago and now, almost 20 years later many other games have greatly overcome this title.