no in-game rewards for simply killing enemies.

The game keeps many of the mechanics common to the genre, like fog of war and a map that shows any enemies the player(s) can currently see. The enemy will patrol their territory, impeding the player's attempt to complete the given objectives. Enemy units that come in contact with the player(s) will try to raise an alarm, which will result in continuous waves of enemy reinforcements for as long as the alarm remains active. The player can prevent an alarm