Verified answer
Was Dylan confined in the Oldest House for years?
Quick answer
Yes. Official store copy says Dylan emerges after years in confinement by the Federal Bureau of Control. The sequel starts from his identity as a former prisoner, test subject, and director candidate.
What this means
That history shapes his distrust of the Bureau and his need to recover his humanity. It does not mean every year of confinement or experiment has already been disclosed.
Official source
Steam — official story description
Continue with the relevant guide
Open the related Control Resonant guide for the current topic summary, connected systems, and any later verified changes.
This answer is reviewed against pre-release official information. It states unknown boundaries explicitly and will be revised when Remedy or a first-party store publishes a newer fact.