If you already picked up Metal Gear Solid and are stuck, IGN has a game guide for this PC port of the immensly popular PSX game.
Metal Gear Solid PC = sucks!
(I liked it on PSX but on PC it sucks ass. First Person Perspective is useless because it's so slow that you need about 1 minute in order to turn 360 degrees. The worst thing is that mouse look is not implemented WTF????)