Alien Trilogy/Weapons

9MM semi-automatic Pistol

 * basic weapon
 * first to be available in the game
 * ammo is plentiful

12 Guage sawn off Shotgun

 * has wide blast area

Hand-thrown Concussion grenades

 * used to destroy weak walls
 * good for kill crowded enemies

Flamethrower

 * good weapon to use if being swarmed by facehuggers

M41A Pulse Rifle

 * has 2 modes of fire: armour piercing rounds, and a grenade launcher.

Smart gun

 * fast firing rate
 * auto-tracking