In digital game distribution, a "Build ID" is a unique tracking number assigned by platforms like Valve to identify a specific iteration of a game's files.

The search for a specific "exclusive" build speaks to the passion of the gaming community. Players often seek out specific versions for a variety of reasons:

In the world of PC gaming, players often come across cryptic numbers attached to game versions, especially when digging through patch notes, developer branches, or third-party download sites. One such number is for the acclaimed pixel‑art adventure Owlboy – and it is sometimes labelled as “exclusive.”

I will cite the sources: SteamDB pages for Owlboy config, history, and depots. I'll also reference the general information about the game.

Developers frequently push private builds for closed beta testing, internal quality assurance, or platform-specific compliance (such as tailoring a build for a specific operating system).