Walkthrough and ending
The game is one short path. This page is the path plus the ending. Boss numbers live on the boss table so this stays a sequence, not a second stat block.
Through the Depths
Dess climbs out of a passage with “Made it... Barely.” and gripes about risking herself for a cat-coin. She is collecting those coins for the doctor. She notes that gold is the only metal they can get down there. Something in the wall reminds her she is not alone. She chases a rat, hits the line “The forcefield!!”, and takes a rat trap to the chest.
The SOUL comes down into her body. Her heartbeat is wrong. She calls it demonic possession. Dragged onward, she tells the SOUL it got them into this and had better get them out, and that when the big one notices, the SOUL’s power is what weakens it. They only have to last until the cat is bored.
The two fights
The first fight is the large cat, FRIEND, across the swarm, the old house, the rain, the mouth tower, the knife house, the trick house, and the towers. Pink rails and the yellow big shot are both in play. The music file for that stretch is mus_no_cats. Then CONCATENY arrives: “D-damn it!! Feeding form...” It calls her December, asks if she is in possession of the SOUL, and orders her to weaken the beast to within an inch of its life and let the SOUL be consumed. That fight’s file lists 2000 HP and zero defense, with three attack lists, under mus_the_great_forever.
Ending
The death cutscene for the friend sets completed, saves, stops the music, waits 26 seconds, and loads the credits. There is no extra spoken epilogue in the text files. A no-hit clear sets a second flag, no_hitted, and still uses the same credits. My reading of the win condition is the one CONCATENY speaks: you spend the SOUL, you do not simply delete the cat. I will not invent what Dess does after the credits, because the files stop.
Related
Questions
Are there multiple endings?
The ending script sets one completed flag and then the credits. A separate flag records a no-hit clear. There is no second ending file.
How long is a clear?
One public clear is 10:29 and another is 12:11. These are recording lengths, so they do not define a single standard completion time.
Do you kill the last boss?
CONCATENY’s own lines say to weaken the beast to within an inch of its life and then let the SOUL be consumed.
Sources
Sources checked . See the editorial policy for the public sources and cross-checking method.