- Metroid Zero Mission 100% walkthrough: Follow the main route before completing late-game item cleanup.
- Core route: Move from Brinstar through Kraid, Norfair, Ridley, Tourian, and Chozodia.
- Best habit: Mark blocked rooms and revisit them after gaining movement or weapon upgrades.
- Boss preparation: Save, refill ammunition, and carry enough Energy Tanks for unfamiliar fights.
Metroid Zero Mission 100% walkthrough Route
Metroid Zero Mission 100% walkthrough planning is easiest when the story route and collection route are treated as two connected passes. Progress through the next major region first, then return with the abilities needed to open blocked rooms.
Main Route
- Follow Chozo guidance and major objectives.
- Prioritize progression abilities.
- Use Save Rooms before boss routes.
Collection Route
- Record suspicious blocks and ledges.
- Revisit older regions after upgrades.
- Check map gaps before the finale.
Resource Route
- Refill Energy and Missiles often.
- Keep ammunition for bosses.
- Search side rooms before difficult battles.
| Region | Main objective | Useful priority |
|---|---|---|
| Crateria | Reach the interior route | Learn basic movement |
| Brinstar | Gain early abilities and reach Kraid | Morph Ball, Bombs, Missiles |
| Norfair | Cross heated rooms and improve mobility | Varia Suit, Speed Booster |
| Ridley | Clear the late combat route | Energy Tanks, Missiles |
| Tourian | Defeat Metroids and Mother Brain | Ice Beam, ammunition |
| Chozodia | Finish the post-game route | Power Grip, late upgrades |
Do not stop the main route to force every visible pickup. Many rooms are designed for later backtracking after Bombs, Speed Booster, Power Bombs, or advanced movement abilities.
External references: Nintendo's official game page and the official instruction manual.
Step-by-Step Progression
Use the following sequence when you want a stable story route without losing track of future collection opportunities.
Start in Crateria
Explore the opening ruins, follow the Chozo-guided path, and enter Brinstar. Do not spend too long searching for items that require later abilities.
Build the Brinstar Toolkit
Collect Morph Ball, Bombs, Long Beam, Charge Beam, Missiles, and other early upgrades. Use Bombs to inspect suspicious floors and walls.
Clear Kraid and Enter Norfair
Prepare for Kraid with Missiles and a nearby save or refill. After the battle, use Varia Suit protection to explore Norfair safely.
Improve Mobility and Reach Ridley
Obtain movement upgrades such as Speed Booster and Hi-Jump Boots. Search side rooms for Energy Tanks before committing to Ridley's route.
Finish Tourian, Then Clean Up
Use Ice Beam against Metroids, defeat Mother Brain, complete the escape, and then explore the Zero Suit and Chozodia sequence before the final collection sweep.
| Checkpoint | Save before | Confirm before leaving |
|---|---|---|
| Kraid route | Boss approach | Missiles and Energy |
| Norfair | Long heat sections | Varia Suit and refill |
| Ridley route | Boss entrance | Mobility upgrades |
| Tourian | Metroid gauntlet | Ice Beam and ammunition |
| Chozodia | Major post-game route | Power Grip and recovery |
If a door or passage cannot be opened, record its location instead of repeatedly testing it. The required solution is often a later beam, suit, Morph Ball upgrade, or movement technique.
Boss Preparation and Combat Tips
Boss fights become more manageable when preparation is treated as part of the route. Refill before the arena, learn the visual attack cues, and attack only during clear openings.
| Boss | Primary cue | Recommended approach |
|---|---|---|
| Deorum | Exposed eye | Stay mobile and fire Missiles during the vulnerable phase |
| Kraid | Open mouth and platform changes | Use platforms, avoid projectiles, and aim for the mouth |
| Ridley | Fast movement and contact pressure | Keep distance, wait for a clean firing line, and avoid trades |
| Mother Brain | Glass tube, eye, and beam | Break the barrier, target the eye, and watch the beam |
| Mecha Ridley | Large mechanical attacks | Move early, then punish exposed components |
Before the Arena
- Save at the nearest Save Room.
- Refill Energy and Missiles.
- Check that the next route is understood.
During the Fight
- Watch the attack cycle first.
- Keep room to retreat.
- Favor survival over rushed damage.
After Victory
- Follow the newly opened route.
- Refill before the next long section.
- Mark nearby rooms for cleanup.
A cautious fight usually saves more time than repeated failed attempts. Preserve Energy, use the arena space, and wait for predictable damage windows.
100% Collection Checklist
Complete the story route first, then use this checklist to organize the final sweep. Focus on rooms blocked by abilities you already possess, rather than revisiting the entire map randomly.
Final Collection Goals:
- Check Brinstar for Missile Tanks, Energy Tanks, and hidden Bomb routes
- Revisit Norfair after obtaining Speed Booster, Super Missiles, and Power Bombs
- Search Kraid and Ridley side rooms for missed expansions
- Complete Chozodia exploration with Power Grip and late-game movement abilities
- Confirm unexplored map squares and remaining item markers before the final file check
| Cleanup phase | Search focus | Helpful abilities |
|---|---|---|
| Early cleanup | Morph Ball tunnels and bomb blocks | Morph Ball, Bombs |
| Mid-game cleanup | High ledges and long corridors | Hi-Jump Boots, Speed Booster |
| Advanced cleanup | Green doors and special blocks | Super Missiles, Power Bombs |
| Late cleanup | Chozo ruins and isolated rooms | Gravity Suit, Screw Attack, Power Grip |
| Final sweep | Unexplored map squares | Full equipment set |
Use the map as a memory aid. When a room contains an unreachable ledge, unusual wall, or locked colored door, return after the relevant upgrade instead of guessing at the solution.
Walkthrough FAQ
Q: Should I collect every item during the first visit?
No. Follow the main route when an item requires a later ability. Record the room and return during the cleanup pass.
Q: What is the safest route through the main campaign?
Progress from Crateria to Brinstar, Kraid, Norfair, Ridley, Tourian, and then the post-game Chozodia sequence.
Q: Which upgrades matter most for 100% completion?
Morph Ball, Bombs, Missiles, Varia Suit, Speed Booster, Hi-Jump Boots, Super Missiles, Power Bombs, Screw Attack, and Power Grip are especially important.
Q: How should I prepare for Mother Brain?
Save beforehand, refill Energy and Missiles, watch the beam pattern, and attack the exposed eye between defensive hazards.
The most reliable completion method is route first, upgrade second, cleanup third. Keep the map organized and revisit blocked rooms after each major ability.