Knock out someone is the best way to neutralize someone without killing.
A knock out person will lie on the ground with little stars orbiting their head forever.
You won't be able to interact with them but you can kill gib corpse.
Way to knock out[edit | edit source]
Solo / Multiplayer[edit | edit source]
In solo you can't knockout yourself but in multiplayer you can knockout your mate during 30sec using the tranquilizer gun.