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Half-Life: Opposing Force Hints
Hand Grenades
Hand grenades are the standard-issue weapon of choice for clearing out rooms and tossing around corners. They have 3-5 second detonations (depending on how quickly you release them) and bounce accordingly off of whatever they hit, even enemies.
Use hand grenades to clear out rooms, to trigger explosives, and to surprise your enemies. You can carry 10 hand grenades at any given time. They can be used underwater as well.
