Power Beam

Samus Aran's Power Beam is her basic weapon. It comes with her Power Suit. The Power Beam does little damage to enemies, although it can easily kill the first ones in the games. The Power Beam usually comes with the Charge Beam, although sometimes not so. Over the course of the Metroid games, Samus has recieved various upgrades to her beam:
 * Long Beam
 * Wide Beam
 * Plasma Beam
 * Charge Beam
 * Dark Beam
 * Light Beam
 * Annihilator Beam
 * Ice Beam

There is also a cheat upgrade called the Spacetime Beam.