Half-Life: Blue Shift/Weapons

Crowbar

The crowbar is a bit of a trade mark within the the Half-Life series. Although its mostly there to get you by when ammo is in short supply, you can also use the crowbar for more practical things like breaking windows/crates. Useful on the headcrabs.
Primary Fire: Crowbar swing

Glock 9mm Pistol

Not as powerful or as quick firing as other weapons but good for hitting things at a distance.
Primary Fire: Single shot
Secondary Fire: Rapid fire

.357 Magnum

Considerably more powerful than the Glock, usually one shot, one kill. Low clip capacity.
Primary Fire: Single shot
Secondary Fire: Zoom

Assault Shotgun

A semi-automatic assault shotgun that loads from the bottom. Good for close quarter battles.
Primary Fire: Single shot
Secondary Fire: Double shot

M4 Assault Rifle

More powerful than the Glocks' rapid fire and a bigger clip. One of the main weapons of the game.
Primary Fire: Rapid fire
Secondary Fire: "On-contact explosive" grenade

Hand-Grenade

3 second timer, the longer you hold it the less time before it goes off.
Primary Fire: Throw grenade

Satchel

More powerful than the grenade, but with less range. Good for throwing into foxholes, windows or doors.
Primary Fire: Throw satchel
Secondary Fire: Detonate

RPG (Laser-Guided Rocket Launcher)

Rockets will fly towards the laser target, or in a straight line when it is switched off. Good for bigger enemies.
Primary Fire: Launch rocket
Secondary Fire: Switch laser on/off