How many missions are there in IGI 2?

"IGI-2: Covert Strike" contains 19 single-player missions that range from covert surveillance and escapes to heists and large-scale assaults. The missions occur in a wide variety of indoor and outdoor locations. The player gets to choose how he approaches and completes each mission.

Each mission has an objective, and there are multiple paths available to accomplish each of these goals. Because the player is outnumbered in all the missions, stealthy approaches are usually the most effective, but each player can choose how he wishes to play on a mission-by-mission basis. Difficulty levels are set at the beginning of each game, and cut scenes precede and follow each mission to tell the game's story.