File 10 of Astral Chain is titled Madness and this walkthrough covers everything you need to do and all the cases. Interact with Olive and Hal at the start then start exploring the waypoint area. Once you step outside, you’ll talk with the Cat lover who will then give you this next case.
Astral Chain File 10 Walkthrough
Once you’ve covered all the markers on your map, you’ll come across the Cat Lover in the tunnels. She’ll hand you the catnip so you can track the cat down. Go after the trail into the Astral Plane and you’ll find the cat after taking out some foes.
You’ll spot a blue marker on your map when going back. Go to it and you’ll end up at a gate disposal case. Hall will call you after you’ve taken it out and give you a new mission.
Defective Detector Mission
Head to the yellow waypoint and then press A to use the detector. Your goal is to take out foes and protect yourself while it charges up.
Once you’re done with that, you’ll have to go to another waypoint and you’ll encounter the Uneasy Man. Take him and the Chimera down with the help of your Legion.
At that point, Hall will call you to tell you it’s been fixed. Going back outside will trigger a cutscene with Olive. Hal will call and tell you to go to her. Catch up and then leave the area with her.
The new area is filled with enemies so use your IRIS to track their field of vision and stealthily take them down. After that, you’ll come to a bridge area with one guard keeping an eye out. Distract him by shooting at the pipes and then run across.
Go up the right side of the ladder to avoid detection before dealing with the foe.
You’ll get a call from Olive once you’ve platformed your way to the marker. He’ll instruct you to take the ladder down so do that and then take out the two guards before proceeding to the big door.
Drain the water by interacting with the button and then head back to the big room. Once you’ve eliminated the remaining guard, climb down. Keep moving through waypoints. Olive will help you deal with any Chimera ambushes that happen.
Once that’s all resolved, you’ll go to Brenda in the Large Room. You’ll need to evade a bunch of laser attacks by Chimera. Stay in cover as much as you can until you can open the door with your Arm.
Kronos Boss Fight
Opening the door will lead you into this boss fight. Kronis is a shielded enemy so get your Axe Legion ready. Take out the shields faster than they can regenerate and stick to attacking him as frequently as you can.
He’ll try to smash you so avoid that by sticking behind him with previous bosses. Just keep repeating these steps and this fight will be over.
Ravens and Evil Akira
You’ll have to battle a new enemy type known as Ravens. Shoot them down with you Arrow Legion and you’ll get into a scuffle with an evil version of Akira.
Akira-Legion Fusion Boss Fight
Carefully time your attacks and dodges for a while until a cutscene happens that lets you fuse with your Legion.
Then do serious damage to Akira with your attacks quickly. If he runs around, pursue him to ensure you attack him and end this fight quickly. Winning this fight ends File 10.