Lair 14: Parking Garage
After defeating the Octolings on the parking garage roof, search this corner, behind the vehicle, for the stage’s Sardinium.
Lair 15: Octoling Assault
Look for the stage’s Sardinium in this corner near the Octolings’ base—there’s a Toxic Mist trap nearby, so tread carefully. The Sardinium is stored in a reinforced crate, requiring multiple hits. Make sure no Octolings sneak up behind you while you’re pelting this crate with ink.
Area 04: Slimeskin Garrison
This area’s Sardinium is stored in the orange crate directly beneath Lair 16. Traverse the Inkfurlers along the side of the platform to reach this concealed platform.
Lair 16: Secret Bowling Alley
After eliminating the Octosniper, follow the nearby Octoballer toward the grated ledge. When it’s clear, drop through the grate to land on this hidden platform to collect the stage’s Sardinium. Ink the wooden wall beneath the grate to return to the upper platform—but watch out for incoming Octoballers on your way up.
Lair 17: Octocommander Fortress
The Sardinium is located on a high ledge near the first Ride Rail. Ink the metal diamond plate wall of this platform while traversing the rotating platform stand on the vehicle and aim up to completely coat the wall with your Hero Slosher. Once inked, swim up the wall to access this ledge and grab the Sardinium, stashed in a small orange crate.
Lair 18: Towering Heights
You only have a chance to retrieve this lair’s Sardinium while riding the moving platform toward the Zapfish. Position yourself atop the center sponge as the platform begins a 90-degree turn. It’s important to keep the sponge fully expanded and filled with ink. Stay on top of the sponge to retrieve the Power Egg Can farther down the moving platform’s path.
Lair 19: The Experimentorium
The Sardinium is located on a narrow platform behind a Splat Switch cube. After hitting the Splat Switch for the first time, move along the newly rotated, narrow platform to the left. From this angle you can hit another Splat Switch on the same cube, causing it to rotate. Ink the side of the cube and squid-jump onto the side while swimming up. Once atop the cube, you can access the platform holding the Sardinium, stored in a small orange crate.
Lair 20: Propellerland
You must simultaneously move this Propeller platform and activate a Gusher to retrieve the stage’s Sardinium. Once the platform is clear of enemies, stand near the Gusher and take aim at the distant propeller, hitting it with the Hero Brella or a Curling Bomb. This causes the platform to move beneath the Sardinium. Immediately activate the Gusher and ride atop the geyser of ink as the Propeller returns to its starting point, putting you within reach of the Sardinium. Keep riding atop the Gusher to pass through three squid rings as the Propeller returns.
Lair 21: Octolings Ahoy
The lair’s Sardinium is stored in a crate directly beneath the Octoling spawn point. Reaching this location requires an uphill climb, usually while facing opposition. Use Curling Bombs to ink a path ahead while making conservative probing attacks on the enemy defenses. If you find yourself under heavy attack, retreat and try again later, once the Octolings have dispersed.
Area 05: Cephalon HQ
This Sardinium is hidden beneath an isolated platform between Lairs 25 and 26. Use a saucer to reach the top of the platform, then shoot ink over the side to reveal an invisible platform below. Drop down onto the freshly inked platform to access the alcove beneath and grab the Sardinium.
Lair 22: Underground Expressway
The Sardinium is locked in a box atop this platform. Eliminate the Shielded Octotrooper here to retrieve a Splashdown special. The key to the box is held by a Tentakook patrolling a trench-like recess at the base of the platform. Circle the trench and spread ink while chasing the Tentakook. There’s nowhere to corner this Tentakook, so attack aggressively, swimming forward through your ink to move within attack range. Curling Bombs are effective for chasing the Tentakook send a Curling Bomb one direction while you move in the other in an attempt to trap the Tentakook. Once you’ve splatted this elusive enemy, unlock the box on top of the platform to retrieve the Sardinium.
Lair 23: The Octogalaxy
When reaching the checkpoint with a Dash Track, focus on the Sardinium floating in the distance. Run across the Dash Track to access the nearby Ride Rail. Two more Ride Rails appear ahead, flanking the first one—jump to the left or right to avoid the vertical Ink Piston. Once you’re beyond the piston, the Sardinium comes into clear view. Perform a couple more jumps to reach the center Ride Rail leading up to the Sardinium. Jump forward at the end of the Ride Rail to pass through a squid ring and collect the Sardinium.
Lair 24: Transfer Junction
This one is hidden along the back side of this moving platform. After inking and traversing the front side of the platform, hop to the adjoining platform and turn around to spot the Sardinium. As you did with the front side of the platform, thoroughly ink the back side and squid-jump onto the side to retrieve the Sardinium. Stay in squid form until you can jump back onto the stationary platform.
Lair 25: Platform Madhouse
After scaling the nearby wall, look down and to the left to spot a low platform holding the Sardinium. Drop down to collect it, then use the nearby launchpad to advance to the next checkpoint.
Lair 26: Paradise Lanes
After passing the first checkpoint, drop to the narrow walkway below and turn around to spot a small crate, containing this lair’s Sardinium.
Lair 27: Octoling Workout
The Sardinium is stored in the large orange crate atop this elevated grate, not far from the Octoling spawn point. Target the Inkfurler at the base of the wall to extend it up to the grate. Swim up the extended Inkfurler to retrieve the Sardinium
Hold this elevated position to eliminate any nearby Octolings before moving on this is a great sniping perch if you’re using the Hero Charger.