Players will need to use stealth throughout the levels, since the player can die with just a few hits. If players fire their rifles when there are loud noises in the background, the player can kill enemy soliders without other soldiers noticing. However, the player must be careful to hide dead bodies or shoot when no one is watching, since dead bodies will alert other enemy soldiers and make them harder to hit. If the player holds his or her lungs, the in-game time will slow down and there will be a marker that shows where the bullet will hit. The games have an X-ray feature that shows where the bullets hit the enemy and how the bullets injure enemies. Points are awarded based on how far the player is, where the player hits the enemy, and whether other enemy soldiers notice the player killing them.