Semtex

Sentex is a weapon used by the enemy in Metal Gear Solid 2. It is a very powerful explosive device, very similar to C4.

It is used at 2 points in the game. These are:
 * Engine Room, Port on the Tanker Discovery. It is activated if the Infra-red sensors are disturbed. I.e. You walk through them.
 * Shell 1-2 Connecting Bridge on the Big Shell