Metroid Prime Intended Item Order

1. Missile Launcher: unlocks Morph Ball and Artifact of Truth
2. Morph Ball: unlocks Charge Beam and Morph Ball Bomb
3. Charge Beam
4. Morph Ball Bomb: unlocks Varia Suit
5. Varia Suit: unlocks Boost Ball and Artifact of Nature
6. Boost Ball: unlocks Space Jump
7. Space Jump: unlocks Wave Beam and Artifact of Strength
8. Wave Beam: unlocks Super Missile (also requires Charge Beam) and Thermal Visor
9. Super Missile
10. Thermal Visor: unlocks Spider Ball (also requires Super Missile)
11. Spider Ball: unlocks Ice Beam, Wavebuster, and Artifact of Wild
12. Ice Beam: unlocks Gravity Suit
13. Gravity Suit: unlocks Power Bomb and Artifact of Lifegiver
14. Power Bomb: unlocks Grapple Beam, X-Ray Visor, Ice Spreader, and Artifact of Warrior
15. Grapple Beam: unlocks Plasma Beam
16. X-Ray Visor: unlocks Artifact of Chozo
17. Plasma Beam: unlocks Phazon Suit (also requires X-Ray Visor), Flamethrower, and Artifacts of Spirit, Elder, Sun, and World
18. Phazon Suit: unlocks Artifact of Newborn