Cephalon HQ is the fifth and final sector of Hero Mode in Splatoon 2. The area can be accessed after defeating the fourth boss. The sector contains six stages and one boss fight. One Sardinium, one Sunken Scroll, and one Ticket can also be found in this hub world.
Stages[]
There are six stages and one boss fight that can be found in Cephalon HQ.
Underground Expressway[]
The entrance to this stage is found after taking the UFO that passes over the giant hole. Ride until to see four pillars. Spray ink to show an invisible platform and look for the invisible entrance.
The Octogalaxy[]
The entrance to this stage is found by taking the UFO over the giant hole. Look for the first checkpoint area. Hit the inkfurler and jump to the next area. Hit all three inkfulrers at once to give you a path up to the wall to the entrance.
Transfer Junction[]
The entrance to this stage is found after riding the UFO that is opposite of the giant hole. Take it to the checkpoint. Spin the fan and use the dash track to get to the other platform. Use the next dash track to reach the spinning blocks. Scale them to reach the entrance.
Platform Madhouse[]
The entrance to this stage is found after hopping on the UFO to the left of the giant hole. Get off at the checkpoint. Use the next UFO to reach the next checkpoint. Scale the moving platform, hit the target, climb the moving wall, and walk along the ride rail to reach the entrance.
Paradise Lanes[]
The entrance to this stage is found after taking the UFO that passes over the giant hole. Ride to till you see a solid platform with a checkpoint. Hit the red switch, hit the switch afterward to climb the next platform. Hit the last red switch to bring the entrance down.
Octoling Workout[]
The entrance to this stage is found after riding the UFO opposite of the giant hole. Get off at the last checkpoint, switch to a charger and hit the fan. Jump past the ink jets and bounce your way to the entrance.
Bomb Rush Blush[]
The entrance to this stage will appear in the center of the giant hole after you've collected all 6 Zapfish.
Sardinium[]
Look for the UFO to the left of the giant hole. Look off the edge and spray ink at the murky water to reveal an invisible platform. Drop and down and destroy the creates hidden within the wall to reveal the Sardinium.
Sunken Scroll[]
Hop onto the UFO to the left of the giant hole. Get off at the checkpoint and hop to the next UFO. Shoot the green balloon hanging around the Stage 25 entrance. Other balloons will appear all over the place so splat most of the map in order to keep your speed high. The last balloon will drop the scroll onto an invisible platform. Ride the UFO opposite of the giant hole, splat ink around to reveal three invisible platforms that will lead to the scroll.
Ticket[]
On the way to the entrance of Stage 27, look for an orange crate above the ink jet pillars. Splash with ink to reveal the ticket inside.