: If you're going for a high rank (like Big Boss), use the Mk. 22 tranquilizer gun and avoid killing anyone, including bosses (use non-lethal methods in their second "Beauty" forms).
The OctoCamo suit is your best friend. To get the highest camouflage percentage: backgrommp4
The Mk. II is a remote-controlled drone that is essential for scouting: : If you're going for a high rank
: Use it to grab ammo or items in dangerous spots. 4. Optimize the "War Economy" backgrommp4