This page contains Metal Gear Solid 2: Sons Of Liberty Hints for Playstation 2 called "Instant sleep" and has been posted or updated on Aug 8, 2007 by Shooterman0990. Let us know what you think of this Hint by thumbs voting.
Under the normal, hard, and extreme difficulty settings, the sentries do not sleep instantly with the tranquilizer gun. Try to hit them and run to them. You may be able to give them the punch, punch, kick, kick combo and they will automatically be knocked out.
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