Quick answers for Metroid: Zero Mission.

How do I get past the first green door in Ridley?
You need Super Missiles. Save, return up the same elevator and enter the larva chamber on the left. Drop through its newly exposed deeper pit, follow the down-left tunnel and climb to Imago. Hit its stinger from behind with missiles, dodge its final rush and collect the Super Missile Tank. Select Supers, hold R and press B to open a green door.
Does Varia Suit protect against lava in Zero Mission?
Varia Suit protects against heated air and acid; lava still damages Samus. Use platforms above the orange pools. The later Gravity Suit protects against ordinary lava, but the ruined Tourian chamber’s late liquid hazard remains dangerous.

Before you leave Chozodia for cleanup

Use this checkpoint at the bridge Save Room before entering the final encounter.

  • Restore the suit and collect Power Bombs. Save and refill at the bridge Save Room before the final encounter.
  • Return to the glass tube joining the ship and ruins. Place a Power Bomb inside it, then drop below.
  • Power Bomb the rock wall on the left. Descend past the electrical enemies and save in the bottom-right room.
  • Follow the low rooms left to the yellow door into Crateria. Return via that water chamber’s right yellow door when ready to finish.

Continue with the complete route in the app.

What this Metroid: Zero Mission guide covers.

ReleaseOriginal USA English Game Boy Advance release, on Normal difficulty.
RouteComplete story through the final escape, including the suitless Chozodia route and practical nearby expansions.
CleanupA separate plan reopens Zebes before the final encounter and helps you revisit skipped upgrades. It does not list every item location or promise 100% collection.
Other routesSpeedruns, low-percent routes, sequence breaks, Easy/Hard tuning, ending-gallery requirements, Fusion link extras and the embedded NES game are outside this guide.

One story route, seven readable chapters

  1. Brinstar: Morph Ball, Missiles, Charge Beam and Bombs
  2. Norfair and Crateria: Power Grip and Ice Beam
  3. Kraid: machinery, acid worm and Speed Booster
  4. Hi-Jump, Varia Suit, Wave Beam and the Ridley detour
  5. Ridley, Screw Attack and Tourian
  6. Chozodia: stealth, Chozo test and Power Bombs
  7. Optional cleanup, final encounter and escape

Directions that carry your progress forward

Each visit names the ability, doorway or room feature needed next. Save and refill stops break up the route, while a return-player locator links your last upgrade to its exit instructions and the next area. The final escape includes the shutter bypass, cockpit floor, Power Bomb tunnels and docking-bay fight.

More quick answers.

Is this a full walkthrough or a 100% item guide?
The Standard Edition covers the complete Normal story through the final escape, with practical expansions and a separate pre-final cleanup plan. It is not an exhaustive 100% location atlas. This webpage is a preview; read the complete walkthrough in the free Retro Game Guides app.

Continue with the complete route in Retro Game Guides.

  1. Tap Open Guide in App.
  2. The supported game is added when a free library slot is available.
  3. The Standard Edition opens at saved progress and stays ready for offline reading.