Backgrommp4

: It can deliver an electric shock to knock out enemies quietly.

You’ll collect many weapons from fallen enemies. Since most are "ID-locked," you can’t use them immediately.

: 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).

: Your camo index spikes when you are prone on a surface.