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These mines are attached to walls and project a laser beam as a tripwire. They can be thought of as "Laser-Activated Claymore Mines". If the laser beam is interrupted, the mine detonates in an explosion as powerful as a satchel charge.
To place a mine, the player must get close to a surface and aim the crosshair where the mine will be placed. When the mine is placed on the wall, it will give off a rising whining sound, signifying the laser warming up. The mine will project a laser in three seconds. Then if an enemy runs past this point they will trigger the laser causing it to explode. Tripmines can also be detonated by shooting them. Laser tripmines have no secondary attack mode.
Tripmines are used as a puzzle device in the chaper Surface Tension, where Gordon has to go through an old ordinance storage facility filled with mines. Triggering any of the mines results in a huge chain of explosions.
The Laser Tripmine can be used to trick any enemies that will chase the player.
The player can place any explosives and run away to clear the tripmines. It is recommended to do this with a Satchel Charge.
The player can also use any weapons to clear out tripmines, except for the Crowbar or any melee weapons as this will cause them to explode and kill the player. It is recommended to shoot them from safe distance.
The player can also choose to avoid the tripmines by crawling or jumping over them.
It is also possible to jump on the mine itself. Jumping on a mine will not set it off.