Electrified floor

Electrified floors are floors that, upon activated, deliver an electric current that is enough to severely electrocute anyone who touches the floor when activated. The switchboard for activating electrified floors are generally in the same general area as the electric floor itself. They are primarily used as security devices to diminish the chances of an intruder infiltrating the area.

Outer Heaven
The mercenary nation of Outer Heaven frequently utilized electric floors throughout the base. In addition, during an alert, personnel are also advised to activate the electric floors to trap the intruder using switchboards located nearby. Solid Snake managed to destroy several of these using M47 Dragon missiles on the switchboards nearby. In addition, there was a final electrified floor located outside of the TX-55 Metal Gear's hangar, which continuously ran on electricity without a switchboard nearby. Because of this, Snake had to traverse across while being electrocuted.

Shadow Moses Island
The western labs located in the second floor basement of the nuclear warhead storage building contained an electric floor. During the Shadow Moses Incident, the Sons of Big Boss activated the electric floor as a security measure to ensure that either Hal Emmerich doesn't escape from his lab or that Solid Snake doesn't arrive to get to him. Because of advice from someone under the alias of "Deepthroat", Solid Snake managed to disable the generator's electrical output with a well-placed Nikita remote-controlled missile, although he was unable to destroy it outright because of the relative little warhead power it has because of it being primarily composed of electronics, which was discovered nine years later. When Snake returned to Shadow Moses, he also, via the Mk II, reactivated the electrified floor to eliminate a Gekko that managed to infiltrate the area.

Big Shell
The Big Shell offshore cleaning facility contained an electrified floor on Shell 2's core. During the Big Shell Incident, the Gurlukovich Mercenary leader Olga Gurlukovich, under the Sons of Liberty terrorist group's leader, Solidus Snake's orders, activated the electrified floor to dissuade Raiden from trying to retrieve President James Johnson before his vital signs would activate Arsenal Gear. However, Raiden managed to, under the Colonel's advice, locate a Nikita missile launcher and disable the generator's output, thus shutting down the electrified floor. The electrified floor system was presumably destroyed for good when Arsenal Gear became active with the destruction of the Big Shell.