The secret boss in Splatoon Raiders is Lord Saltimatum, found on floor 100 of the Great Salmon Mess Hall after clearing the main story good ending and climbing the post-game dungeon.
Lord Saltimatum is the hidden floor 100 boss tied to the secret ending, not the same encounter as Salmonarch. Treat the climb as the real unlock check: once post-game access is open, you have to clear the long dungeon route before the fight appears.
Lord Saltimatum quick facts
| Detail | Answer |
|---|---|
| Secret boss | Lord Saltimatum |
| Location | Great Salmon Mess Hall, floor 100 |
| Unlock path | Clear the good ending, open post-game exploration, then finish floors 1-99 |
| Ending tied to the fight | Secret ending or true-ending route |
| Recommended level | Around Level 100 |
| Failure condition | The run fails after three party wipes |
| Reward | The secret ending after defeating the boss |
Lord Saltimatum sits at the end of the post-game climb, so the fight is less about finding a hidden door and more about reaching the final floor with enough control to survive a long boss encounter. The arena demands patient movement, clean dodges, and careful burst damage instead of a fast damage race.
How to reach Lord Saltimatum in Splatoon Raiders
Finish the story route
Complete the main story until the Throne Room finale becomes available.
Beat Salmonarch
Defeat Salmonarch in the Throne Room to get the good ending and open the post-game route.
Enter the post-game dungeon
Go into the Great Salmon Mess Hall, also described in some runs as the Bottomless Buffet floor route.
Clear floors 1-99
Keep climbing until every floor before the boss chamber is cleared.
Enter floor 100
Start the floor 100 encounter to fight Lord Saltimatum.
Lord Saltimatum fight flow
KEY!The Lord Saltimatum fight is a long battle with no timer, so the pressure comes from survival rather than a countdown. You get limited mistakes: after three party wipes, the attempt fails. That changes the whole rhythm of the fight. Safe damage is worth more than squeezing in one extra hit before a dangerous attack lands.
Stay close enough to read the boss clearly, then dodge through the patterns instead of trying to tank them. Several attacks behave like one-shot threats against a full health bar, so blocking or eating damage is a bad trade. Use gadgets and movement tools mainly to reposition, escape, and keep yourself lined up for the next safe opening.
At around 70% HP and again near 40% HP, the fight shifts into Power Egg charge phases. Clear the surrounding Salmonids, collect Power Eggs, then use the Drill Attack to knock Lord Saltimatum down. Those knockdowns are your cleanest burst windows, especially for ultimates and heavier damage.
The arena also punishes sloppy spacing. The outer grate can drop you through, and when the arena tightens, the outside area is not a safe fallback because damaging goo rains there continuously. Keep your route inside the usable space, target weak parts when they are exposed, and unload only after the boss is stunned or locked into a punishable moment.
Save ultimates for Drill Attack knockdowns so your biggest damage lands during the safest boss windows instead of during risky neutral movement.
Lord Saltimatum combat habits
| Do | Avoid |
|---|---|
| Play for survival and accept a slower clear | Rushing damage because the fight feels long |
| Dodge close-range attacks after reading their hitboxes | Trying to block, tank, or trade into heavy attacks |
| Use gadgets for evasion and fast repositioning | Spending mobility tools just to force extra damage |
| Clear Salmonids during Power Egg phases | Ignoring adds while waiting for the boss to open up |
| Burst during knockdowns with ultimates and Drill Attack follow-up | Wasting ultimates while the boss is still moving freely |
| Watch the arena edge as the usable space shrinks | Retreating onto the outer grate or goo-covered area |
The cleanest way to win is to slow the fight down. Lord Saltimatum gives you enough time to chip away, clear adds, charge the Drill Attack, and reset your position, but it heavily punishes players who chase damage through unsafe patterns. If you are choosing between one more shot and a clean dodge, take the dodge.
There is also a rare card-reflect detail attached to the fight: the boss may send out a card that can be shot back for extra damage. Do not build your plan around seeing it. If it appears, punish it; if it never appears, the normal plan of dodging, charging Power Eggs, landing Drill Attack knockdowns, and bursting safely is enough.
Salmonarch and Lord Saltimatum are separate bosses
Salmonarch is the final story boss in the Throne Room. Beating Salmonarch gives you the good ending and opens the post-game path.
Lord Saltimatum comes later, after the floor climb, on floor 100 of the Great Salmon Mess Hall route. That is the secret-ending boss, so do not stop at Salmonarch if you are trying to finish the hidden post-game encounter.
Remnant Shadow is a separate rumor
Remnant Shadow is sometimes described as another hidden boss tied to Deep Altana Ruins, 12 dark ink traces, Lv.5 facilities, Memory Series gear, and a perfect clear of Silent Abyssal Zone. Keep that separate from this route. The reliable secret-boss path for this guide is the Lord Saltimatum fight on floor 100.
Japanese boss listings also use the name Shiozuke-no-Oomikami for a hidden boss in the same location. That appears to refer to the Lord Saltimatum encounter, but the name mapping may vary by language or build.
Frequently Asked Questions
Where is the secret boss in Splatoon Raiders?
The secret boss room is at the end of the post-game dungeon route, on floor 100 of the Great Salmon Mess Hall.
What are the requirements to unlock the secret boss?
You need the good ending first, which comes from beating Salmonarch, then you need to clear the post-game climb up to the final floor.
Is the secret boss the same as Salmonarch?
No. Salmonarch is the story finale gate; Lord Saltimatum is the later post-game boss for the secret ending.
Does the Lord Saltimatum fight have a timer?
No. The fight is untimed, which is why patient play works better than forcing risky damage.
What level should you be for Lord Saltimatum?
Around Level 100 is the target, matching the floor 100 endgame placement and the damage pressure in the fight.
More questions⤵
Should I follow the Remnant Shadow route for the secret boss?
Not for this guide’s secret boss. Remnant Shadow belongs to a separate hidden-boss rumor, while Lord Saltimatum is reached through the Great Salmon Mess Hall floor 100 route.
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