Keep hidden as you proceed to avoid being found by guards, cameras, sensors, and searchlights.
Open as many doors as you can to find weapons, equipment, and prisoners.
It takes 3 punches or 1 hit with a knife to defeat enemies.
When you receive a codec call from someone, you'll see the CALL sign. Try to accept these calls as much as you can, as they could provide important advice.
If you are lost, try contacting your comrades with the codec. They may have some valuable advice.
If you use a firearm, the enemy will hear the gunshot/explosion and discover you. When using the Beretta M92 or the H&K MP5 Machine Gun, use a silencer to keep the enemy from hearing gunshots.
Try to keep your ration and ammunition supplies as full as possible for the battles to come.
Use continue to resume the game with all your weapons and items from the beginning, giving you the advantage in your mission.
Your first step is to find the entrance to the base. Once there, your allies will contact you, so be sure to answer the call.