Metroid Prime

Scan 50% of the Creature & research data.

Scan 100% everything.

Collect 100% all items.

Finish the game on Hard mode.

If energy or ammunition is out of your reach, aim and charge your beam. The energy or ammunition will come to you.

Beat Metroid Prime to unlock Hard Mode. In this mode, enemies attacks are more powerful than normal.

Any beem for blue doors. Wave beam for purpil doors. Ice beam for white doors. Plasma beam for red doors.

Finish the game with a 74% or less completion percentage for the normal ending sequence. Finish the game with a 75% to 99% completion percentage to view an alternate ending sequence. Finish the game with a 100% completion percentage to view the best ending sequence.

Endings are based on percentage in this game, not on time, so relax and enjoy the scenery. The percentage itself actually refers to the items pickups in the game. Scanning and the Log Book aren't counted in that percentage.

Below 75% - Samus leaves the exploding Impact Crater, calls her ship in, and hops on top of it before the whole Artifact Chamber blows. She stares at the wrecked chamber for a moment, and the scene cuts as she's about to remove her
helmet. End credit roll. Samus' Gunship flies away from Tallon. Congratulatory screen showing Samus with a victory pose and percentage.

75%-99% - Samus leaves the exploding Impact Crater, calls her ship in, and hops on top of it before the whole Artifact Chamber blows. She removes her helmet and stares at the wrecked chamber for a moment, then departs. End credit roll. Samus' Gunship flies away from Tallon. Congratulatory screen showing Samus with a victory pose and percentage.

100% - Samus leaves the exploding Impact Crater, calls her ship in, and hops on top of it before the whole Artifact Chamber blows. She removes her helmet and stares at the wrecked chamber for a moment, then departs. End credit roll. Samus' Gunship flies away from Tallon. Congratulatory screen showing Samus without a helmet in victory pose and percentage. Cut to a scene of a undulating blob of Phazon. A black and red metal hand bursts from the Phazon. An alien eye looks around from the back of the hand.

Normal Metroids (not Prime) can be dispatched rapidly by using Freeze Beam followed by a missile.

Fission Metroids or any other Metroid can be defeated by using a Power Bomb. This is particularly useful during the last part of the game when you are trying to avoid getting damaged.

Enemy weaknesses and recommended weapon:
Aqua Drone: Wavebeam or Wavebuster
Aqua Pirate: Charge Beam or Super Missile
Aqua Sac: Charge Beam, Wave, etc.
Auto Turret: Missile, Power Beam, Ice Beam
Baby Sheegoth: Plasma Beam or Missile
Barbed war wasp: Power Beam
Beetle: Any (best is Plasma Beam)
Blastcap: Any
Bloodflower: Plasma Beam
Burrower: Power Beam, Ice Beam
Chozo Ghost: Super Missile
Crystallite: Plasma Beam
Elite Pirate: Super Missile, Charge Beam
Eyon: Charge Beam
Fission Metroods: Any beam or combo Powerbomb, Phazon Beam
Flaahgra Tentacle (weakness is base of Flaahgra): Morph Ball Bomb
Flaahgra (weakness are mirror reflectors): Charge Beam Stuns
Flickerbat: Any
Flying Pirate (any combo): Charge Beam or Plasma Beam
Geemer: Any Beam weapon
Grizby: Missile
Hive Mecha (weakness are four red lights): Power Beam
Hive: Missile
Hunter Metroids: Ice Beam, Phazon Beam, Powerbomb
Ice Beetle: Plasma Beam
Ice Burrower: Power Beam, Ice Beam
Ice Shriekbat: Any
Incinerator Drone (weakness is red orb when in sight): Any
Jelzap: Combos
Lumigeck: Any Beam
Magmoor: Ice beam
Mega Turret: Wavebuster
Meta Ridley (weakness is chest and head): Plasma or Plasma Beam combo
Metriod Prime 1 (weakness is face): Any Beam weapon
Metriod Prime 2 (weakness is head): Phazon Beam
Metriod: Ice Beam, Powerbomb, Phazon Beam
Oculus: Super Missile
Omega Pirate (weakness is Phazon Armor): Plasma Beam
Parasite Queen (weakness is mouth): Any
Parasite: Any
Phazon Elite: Plasma and Power Beam combos
Plasmatrooper: Plasma Beam
Plated Beetle (weakness is rear abdomen): Any
Plated Parasite: Morph Ball Bomb
Plated Puffer: Missile
Plazmite: Power Beam
Power Trooper: Power Beam
Puddle Spore: Any
Puffer: Any
Pulse Bombu: Wave Beam
Ram War Wasp: Power Beam
Reaper Vine: Any
Reaper: Any weapon
Sap sac: Charge Beam, Wave, etc.
Scarabs: Any
Scatter Bombu: Wave Beam
Seedling: Any
Sentry Drone: Wave Beam
Shadow pirate: Super Missile
Sheegoth (weakness is side of head): Missile, Plasma Beam
Shriekbat: Power Beam
Space Pirate: Power Beam
Stone Toad: Morph Ball Bomb
Tallon Crab: Any
Tangl Weed: Power Beam
Thardus (weakness varies): Charge Beam
Triclops: Morph Ball Bomb
Venom Weed: Any
War Wasp: Any
Wave Trooper: Wave beam
Zoomer: Any

Sometimes the Metroids get in your way and after you get out of a metroids grasp another one comes and holds on to you. An easy way to prevent that is to use one of the morph ball's super bombs. That will get rid of all of them if they are near you. It really halps when you are fighting Metroid Prime. (The final boss)