100% Story Mode Completion Guide

100% Story mode completion comprises of accomplishing all Hero Mode features in Splatoon 3. Read on to find out how to achieve 100% story completion including the locations of all collectibles in each site, the secret bonus stage, as well as the list of rewards you can receive.

How to 100 Percent Story Mode

100% Completion Checklist
Beat Story Mode Complete All Stages Collect All Collectibles Survey All Sites Beat All Stages With Each Weapon

Beat Story Mode

Hero Mode is the single-player story mode campaign of Splatoon 3 entitled 'Return of the Mammalians' where you'll stop the Octarians from accomplishing their evil intentions.

The missions are played by accessing kettles that are covered with grates which requires you to shoot them with ink to open.

Not all kettles have to be completed to beat Story Mode. Accomplishing the kettles that are essential is only half of what you need to achieve to get 100-percent completion.

Hero Mode Walkthrough

Complete All Stages

A major factor in achieving 100-percent completion is by beating all 74 story mode levels or kettles in Hero Mode and the bosses for each level.

Completing every single kettle will unlock you the bonus stage: After Alterna. Head to the secret kettle found in Future Utopia Island to access it.

How to Unlock After Alterna

Collect All Collectibles

Collectibles are items ranging from Sunken Scrolls, Sardinium, Gold Records, Decorations, Food Tickets, and Stickers.

Exploring Areas of Interest which are marked as green on your map also have hidden collectibles in them. Smallfry will generally guide you to them, but there will be times that you have to ink the area to pinpoint the exact location.

You can always check the upper left corner of your map screen to confirm which collectibles have not been found yet.

Survey All Sites

Along with finding collectibles and clearing stages, you must also explore every inch of each site to fill out the map.

Since there are certain parts of each map that cannot be easily reached, we recommend inking every part of the stage to compensate.

How to Survey All Sites

Beat All Stages Using Each Weapon for the Stage

Replaying all stages with each weapon available for that level will contribute to the 100-percent achievement.

Be sure to familiarize yourself with each weapon as not all weapons are convenient to use for each challenge in the stage.

List of All Weapons

100 Percent Story Mode Rewards

Gain Access to the Shel-Drone

The drone will gather all items found in all sites in Alterna. Items will be delivered via the lobby terminal the next day.

To use it, you must pay 999 eggs and can only be used once a day.

How to Use and Unlock the Shel-Drone

Site Stickers

Alterna Map 1	Alterna Map 2	Alterna Map 3
Alterna Map 4	Alterna Map 5	Alterna Map 6

Talk to Agent 2 at the Squid Sisters Camp to receive the special set of stickers that you can use to decorate your locker at the lobby terminal!

List of Stickers

Receive a Special Wallpaper Through SplatNet 3

You can receive a special wallpaper that comes in 2 sizes after completely surveying all sites in Alterna. Players can download this if they have the SplatNet 3 app.

How to Get Splatoon Wallpapers in SplatNet 3

Splatoon 3 Related Guides

Tips and Tricks: Beginner's Guide to Splatoon