To play the old Beta 11, your best bet is to search for a preserved copy, as official storefronts have moved on to the full release version.

(Recommend checking official Hello Neighbor 2 Steam/Epic/Game developer pages and patch notes for authoritative details.)

: This build features a unique "spoiler-free" scenario and a quest involving missing children that differs from the main storyline of the final game. How to Access and Download the Beta on PC

: A notable change blocked speedrunners from triggering the final cutscene by simply climbing through a specific window. PC System Requirements

Since developers often remove old betas to force updates, you must use a video game preservation site. The most trusted source for Hello Neighbor builds is Archive.org or dedicated fan wikis.