All you guys have to do here, is beat a couple bosses to recieve these multiplayer levels.

This is a very simple way to despose of metriods, and you waist no beam ammo. All you need is the power beam, and a door. Of course, the metriod helps too. First, shoot the metroid with the beam, to make it go after you. Face it, with your back to the door. Wait, just wait. When the metroid charges you, dodge to the side. Hint, you can only dodge while locked on. If the metroid hits the door or near it, it will explode.

This glitch is found in the Chykka boss fight. When breaking the last strand off the cocoon, make sure you are in the water. If you are in the water when you break the last strand, after the cutscene, you will be on land, but when you jump you get an anti-gravity lift that lets you go incredibly far, and incredibly high. The game still thinks you are in the water so your jumps are like if you were in water. The disadvantage is, if you touch any water, the effect wears off. Apparently, you must be in dark water when a cutscene occurs to activate this, therefore, the Chykka battle is the only place to activate this.

After you fight Dark Samus in Sanctuary Fortress and you acquire the Echo Visor, you have to go to a room called Main Research. When you go there your objective is to deactivate 3 sonic locks in the room. However, if you destroy 2 or less and you leave the room, when you come back and destroy the remaining locks the door thats supposed to open doesn't open. The door will never open so your game is stuck with no way to progress. This glitch wrecks your game.

In GMFC Compound, your supposed to witness a cutscene and then blast a yellow crate and recieve the Missile Launcher. However, right before the "invisible wall" leading to activate it, there is a boot shaped formation. By jumping onto it, you will be propelled onto the ledge above, allowing you to skip the activation of the cutscene and go straight to the Missile Launcher. After getting it and then activating the cutscene, glitchingly the yellow crate reapperars, with ANOTHER Missile Launcher. Geting this 1, and the remaining 99 items in the game will allow you to have 101% items at the end of the game (your Missile count doesn't go above 255 however).

After entering the judgement pit, don't enter the light sphere in the middle yet. Instead go around the room and jump up to a light beacon to the right of the door, and aim towards the green door across the room. Then begin firing in front of the Luminoth statue's face and, if done correctly, your shots should be stopped in midair by the jump guardian (he's invisible until the fight begins). You can shoot him as much as you like and when you start the fight he will start with that much damage! (you can't kill him before the fight begins but you can get him to the point where 1 shot kills)

You need to be an extremely good player to beat the game with the dark suit, but there IS a way to pass it up, as well as nearly the entire Agon Wastes segment of the game. You can move on to Torvus Bog as soon as you get your translator updated for amber holograms and acquire the space jump boots. The developers for the game put a failsafe in the Abandoned Base in Dark Aether. That is, your energy drains a lot faster in that room unless you have the dark suit. However, there is a shortcut in this room that will allow you to reach the portal within seconds of entering the room.

Once you enter the Abandoned Base, strafe along the right side of the room. Just before the ingclaw, there are two flat rocks up against the right wall with a small crack between them. Jump in this crack to get a small vertical boost that will propel you just high enough to space jump onto the platform with the portal. From here, you can enter Torvus Bog and continue with the game.

In the room called "Windchamber Gateway", look for a piece of metal that links the side of the room with the Power Bomb door to the platform with an Energy Tank. Jump onto this metal and you will respawn back where you started, but you will notice that you didn't take any damage. You won't be harmed by bottomless pits.

Note: This glitch wears off when you go to a different level, turn off the game etc.