WP Grenade

The White Phosphorous Grenade, abbreviated as WP Grenade', is an incendiary grenade that appears in Metal Gear Solid 3. Burning at 2800 degrees Celsius (5000 degrees Fahrenheit for us American types) the WP Grenade is hot enough to burn through flesh and bone. Naked Snake can use it to burn his enemies into dark, charred corpses, and it can also be useful in the online mode for continuing to damage enemies even after the initial explosion. The burning caused by the WP grenade can be put out by rolling or quickly equipping a cardboard box.

The damage potential of WP Grenades comes not only from the intense heat it produces but also from the substance White Phosphorous itself - as the body is exposed to the grenade it absorbs the poisonous phosphorous, leading to possible organ failure. While the use of WP Grenades is not against any international law, it is a rather cruel way of harming/killing the enemy and is particularly effective to shock the enemy.