A very useful machine in Half-Life 2. Created by the Combine and found along the coast, it composes of a motor and four metal beams. These beams are lifted up one at a time, then slam the sand below simultaneously. It is able to do this in rapid succession.

The vibrations caused by this frighten Antlions, and keep them at bay.

The Restrictors found along the coast are relatively small compared to the behemoths guarding the perimeter of Nova Prospekt. These are roughly twice the height of those found along the coast. When deactivated, they release a public warning system which alerts Combines in the area.

There is a two-button switch found on Restrictors, which can turn them on or off. If there are Antlions swarming all over, I suggest leaving it on.

Also called "Thumpers".
Barney saw a pack of Antlions approaching from the distance. Being the smart type, he hurried over to a nearby Restrictor, and turned it on, stopping the Antlions in their tracks.
by Comito February 12, 2008
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A piece located on a car's engine that you remove to give your car a little more juice...but keep it on the down low...its not exactly street legal
took the restrictor plate off to give the red dragon a little more juice, but keep that on the down low, she's not exactly street legal- Frank the Tank
by cal trippin jr June 4, 2009
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A Chicken Restrictor is is a man or woman who intentionally stops a buddy from hooking up with somebody, see also cock block,
Jake: I was getting somwhere with that fit bird last night and Andy came over and shot me down for no reason, so she lost interest. He's a fucking Chicken Restrictor!
by Craggnarr October 12, 2017
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