There is a guide available, but it's currently posted on Patreon.
To be honest, I didn’t expect the public version of the game to require a detailed walkthrough, so I haven’t made one for public release.
That said, Warren’s corruption route is probably one of the most difficult to trigger in the entire game.
🔹 Prerequisite Setup:
You need to raise the protagonist’s corruption level to 20 or higher.
This can be done during the prologue by choosing selfish or self-serving options instead of helping others, or through specific choices while progressing through the main quest.
🔹 Free Time Events (after rescuing Warren):
After you rescue Warren, spend time with him during free time events.
Choose options that don’t provoke him—he’s quite temperamental, and a wrong choice may cause him to stop engaging with you altogether.
Don’t worry if he rejects you when you visit his room at night—that’s actually part of the intended route.
🔹 Key Trigger: 10F Tentacle Event
The most important trigger is during a free time exploration mission in the hideout, where you explore B10 (10th floor).
If you return to the prison cell where the protagonist was originally held, you’ll discover tentacle traces.
This will unlock an important conversation called "Wound on his foot" (Warren_Talk7).
When prompted, choose the dialogue:
“I thought you were stronger than that, Warren.”
This will severely lower his trust and make it appear as though progression has stopped—which is intentional.
🔹 Night Event & Corruption Route Entry
That night, if you visit his room, a mysterious prompt (“...?”) will appear.
You’ll have the chance to follow him—do it.
This triggers an event where Warren is attacked by a tentacle creature.
Do not save him.
Let him get penetrated by the tentacles.
If your corruption level is at least 20, you’ll then get a special option:
“Use him.”
Selecting this will officially begin Warren’s corruption route.