Since you asked for a “guide link,” here is a concise, original walkthrough. Follow these steps to complete the main routes. There is no official “21” step, but if you find a guide numbered 21, it’s likely a puzzle step or ending variation.
A fictionalized, supernatural version of present-day Bavaria.
The visual novel (Bernd and the Mystery of Unteralterbach), specifically Version 2.1 or similar updates, is an adult satirical mystery game featuring Bernd Lauert as he investigates a gang of sex offenders.
The moral? In the world of obscure, fan-translated, or unreleased games, “guide links” are often bait. Pirates and scammers exploit the very human desire for completeness—especially for a mysterious title like Unteral terbach 21 .