After Alterna is a secret stage in Hero Mode accessed through a secret kettle in the Future Utopia Island site of Splatoon 3. You can unlock it by clearing all of the stages in Hero Mode. Continue reading to see a full walkthrough, including how to unlock the stage and where the secret kettle location is.

After Alterna Basic Info and How to Unlock

After Alterna Overview

Stage Location
Enlarge
Site	Future Utopia Island	Stage No.	Final Stage
Entry Fee	333	No. of Tries	3

Clear All Hero Mode Missions to Unlock the Secret Kettle

Clearing all Hero Mode missions will unlock the secret Hero Mode stage, After Alterna. Head to the secret kettle found in Future Utopia Island to access it.

All Hero Mode Rewards and Unlocks

After Alterna Weapons and Rewards

All Weapons Choices and Rewards

Main Weapon	Sub Weapon	Reward
Hero Gear	Smallfry	3333 Power Eggs

After Alterna Walkthrough

First Section

Watch your Footing in the Early Part of the Stage

1. Ink these platforms and splat the enemies before crossing.

2. Since these platforms rotate, you need to constantly keep them inked to cross safely.

3. Instead of staying on the platform to attack, use swim mode to quickly move past these enemies. Then attack them once you reach safe ground.

The early parts of the first section contain multiple platforms spanning over water. Be sure to ink these platforms and use swim mode to jump across them to ensure a safe landing.

Use Squid Surges and Swim Mode to Progress

1. You will find two enemies after Squid Surging up the first wall. Either pop the balloon fish, or use Smallfry to take them out from a distance. Don't hesitate to retreat when they toss Splat Bombs at you.

2. Proper timing is needed to pass this section. If you are having trouble on the wall with the big sweeper, stay in the middle until you find an opening.

3. You can use this platform to hide from enemies while you ink it.

4. You can perform Squid Surges to jump across platforms as well.

Proper timing of Squid Surges will help you clear the next level. Since performing a Squid Surge requires you remain still for a few moments, make sure to defeat any enemies in the area before performing one.

When dealing with enemies from a distance, ink the ground and use swim mode to move across this part of the stage quickly, then defeat them when you are closer. The inked ground will allow you to move faster, and provide cover when you are under attack.

Check Your Surroundings Before Jumping

1. Check the position of the enemies before dropping off the first platform.

2. Make sure are in a good position before moving from the second platform to the third.

3. Enemies will spawn the moment you drop from the third moving platform. Be prepared to attack and keep your distance to avoid being splatted

4. Move along the ink rails while jumping across.

5. If you move quickly along this section. you will not have to worry about getting hit. Defeat the enemy once you approach it.

The next part of the section requires you to cling to walls in swim mode while moving through the stage. Many enemies will often wait to attack you once you land, so check your surrounding before dropping off the platform to ensure a safe landing.

Ink all Platforms Before heading to the Launchpad

Ink the moving platforms in the final section.

Jump and swim across each platform when you are ready.

A series of moving platforms have to be crossed before reaching the end of the first section. Since ink does not wash off these platforms when they are submerged, it is better to ink all of the platforms before attempting to jump across them. This will allow you to focus on simply jumping and not inking.

Second Section

Refrain from Always Using Swim Mode on Rails

The second requires you to pop all the balloons that appear while riding on rails. It is recommended to not only use swim mode when you are low on ink. Swim mode not only makes you move faster but can make it difficult to pop all balloons in time.

Move Across Rails When They Appear

Popping balloons will cause rails to appear, allowing you to progress through the stage. In any situation in which multiple rails will appear, prioritize moving to the most recent appearing rail to proceed smoothly throughout this section.

Use Burst Bombs to Pop Groups of Balloons

If you are having trouble popping clusters of balloons, use Burst Bombs, which you can get by upgrade your Hero Gear. Not only does it have a wide ink radius, but it doesnt require a lot of ink to use.

All Hero Gear Upgrades and Unlock Conditions

Pop All Balloons at the Final Drop Quickly

The final section before the next checkpoint requires you to pop all balloons while dropping off the last rail. Do not panic and pop all of the balloons in time to make the final rail appear.

Third Section

Extend Soaker Blocks to their Maximum Length

Soaker Blocks are the main gimmick of this section, so make sure to extend them to their full length before crossing. The block will briefly shine and emit a sparkling sound effect it is at maximum length.

Use Smallfry to keep Soaker Blocks Extended

There are times when you will have to activate multiple Soaker Blocks at a time to continue. During these situations, activate a block by tossing Smallfry onto it. Smallfry will continue to attack the Soaker Block until you return it, allowing it to stay at its maximum length for as long as you need it.

Smallfry Character Profile: How to Use Smallfry

Ignore the Enemies on the Long Stretch

One part of this stage contains a long stretch of Soaker Blocks with enemies along them. Attacking these enemies one by one will slow your progress, so focus on swimming across the blocks, attacking only when it is absolutely necessary.

Final Section

Ink the Area for Better Movement

The final section pits you against a bunch of enemies in a closed arena. As you are constantly outnumbered, inking the area will provide you with extra mobility, and temporary cover, and help you activate your special weapon quickly.

Use Splashdown for Offense and Defense

Splashdown is very useful for this section, as it can instantly splat enemies that are too close and ink a wide area at the same time. Use it when you need a little breathing room.

Take out Octolings One at a One

While it may be efficient to take out mulitple Octolings in one assault, it is recommended to focus on taking out one enemy at a time, inking the arena, and recovering your ink supply and power suit health. Taking on multiple enemies at once leads to the potential of you being overwhelmed and easily splatted.

Use SmallFry as a Distraction

Smallfry can be placed in front of enemies as distraction which can either be used offensively for an easy splat, or defensively to move out of danger.

Stay Near Spawn Points for Quick Splats

As you defeat the Octolings in this section, new ones will spawn in the four corners of the arena. As such, staying near these corners can often net you a quick kill before the enemy can counterattack. even if you don't manage to splat an enemy right when they spawn, these corners will provide you with a great view of the arena.

Take Note of the Enemies' Specials

Octolings will start using special weapons to attack you. However, they will often wait until you are close enough to use them. Take note of what special weapon the enemy is carrying to properly plan your counterattack.

Make Use of Special Weapons When Needed

Special Weapon cans will continue to spawn in the arena, allowing you to immediately gain access to very powerful attacks. Don't hesistate to pick the up if you need any extra help.

After Alterna Collectible Locations

Special Weapon Locations

Weapon	How to Get
Trizooka	Found in the final section, on the platform in front of you in the arena.
Ultra Stamp	Found on the opposite platform, after getting the Trizooka.
Reefslider	Found on the opposite platform, after getting the Ultra Stamp.
Inkjet	Found on the opposite platform, after getting the Reefslider.
Crab Tank	Found on the opposite platform, after getting the Inkjet.
Ink Storm	Found on the opposite platform, after getting the Crab Tank.
Triple Inkstrike	Found on the opposite platform, after getting the Ink Storm.
Tenta Missiles.	Found on the opposite platform, after getting the Triple Inkstrike.
Ink Vac	Found on the opposite platform, after getting the Tenta Missiles
Killer wail 6.0	Found on the opposite platform, after getting the Ink Vac
Wave Breaker	Found on the opposite platform, after getting the Killer wail 6.0
Zipcaster	Found on the opposite platform, after getting the Wave breaker

Special weapons will continue to spawn after collecting the first Special weapons can. Make sure to use them effectively during the final section to ensure victory.

Armor Locations

In-game Image	How to Get
	Found in front of the checkpoint.
	Found on the tall pillars in the center of the final arena.
	Found on the tall pillars in the center of the final arena.

Splatoon 3 Related Guides

Hero Mode Walkthrough

List of Hero Mode Sites

Camp Cuttle	Future Utopia Island
Cozy & Safe Factory	Cryogenic Hopetown
Landfill Dreamland	Eco-Forest Treehills
Happiness Research Lab	Alterna Space Center