Final Fantasy 7 (FFVII) - Walkthrough Part 26 – Submarine Battle

A complete walkthrough for the Submarine Battle in Final Fantasy 7 (FFVII) including enemies encountered, obtainable items, and boss strategy guides.

Final Fantasy 7 - Game Release

Walkthrough Part 26 – Submarine Battle


Final Fantasy VII - Cloud Strife IconCloud Final Fantasy VIII - Barrett Wallace IconBarret
Final Fantasy VIII - Tifa Lockhart IconTifa Final Fantasy VIII - Red XIII IconRed XIII
Final Fantasy VIII - Caith Sith IconCait Sith Final Fantasy VIII - Cid Highwind IconCid
Final Fantasy VIII - Yuffie Kisaragi IconYuffie Final Fantasy VIII - Vincent Valentine IconVincent

Obtainable Items

Item Location
Key to the Ancients Located at the northernmost part of the ocean.

Walkthrough Part 26 – Submarine Battle Strategy

Area: Underwater World

1 You can either take the Shinra Soldiers on the bridge prisoner or defeat them in battle before you chase the red submarine. Whatever your decision, it will not affect the story.
2 You will be given directions on how to control the submarine. You need to take out the red submarine.
3 Take out the red submarine using torpedoes. You will not get the Huge Materia if you fail, so make sure to save before starting.
4 After destroying the red submarine, you will automatically resurface at the deck area near to Junon.
5 Look for the red submarine wreckage. It is in the southern-most part of the ocean.
6 Take note that you will encounter a boss named Emerald Weapon. Do not engage it at this point of the game. Every time you submerge, the Emerald Weapon transfer to another spot in the ocean floor.
7 After obtaining the Huge Materia, proceed to the northernmost part of the ocean and look for the crevasses.
8 Turn right at the farther section of the pathway and look for a small hidden cave.
9 Eventually, you will find the key item the Key to the Ancients.
← Underwater Reactor Return to Rocket Town and Cosmo Canyon →

Other Walkthroughs

Mako Reactor #1 Mako Reactor #5 Wall Market
Destruction of Sector 7 Shinra Headquarters Escape from Midgar
Mythril Mine Junon Corel
Gongaga Cosmo Canyon Nibelheim and Rocket Town
Temple of the Ancients Wutai Sidequests The Forgotten Capital
Icicle Inn Great Glacier Gaea’s Cliff
Whirlwind Maze Escaping Junon Heading to Mideel
Huge Materia Mission Defending Fort Condor Returning to Mideel
Underwater Reactor Submarine Battle Return to Rocket Town and Cosmo Canyon
Return to Midgar The Northern Crater Final Battle

Final Fantasy 7 (FFVII) Recommended Article List

▼Recommended Articles
Walkthroughs Boss Guides Characters
Beginner's Guide Sidequests Mini-Games
Game Database Enemies Trophies/Achievements

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  1. You missed rocket town and getting the huge materia. No one online has that part covered and it’s infuriating figuring out that code…

    • Hi Avery!

      Sorry about the lacking walkthrough content. Took over this article and updated it. Also, added the information about the code on the next walkthrough.