Usually, a "b" suffix stands for "Beta." But in this context, paired with the low version number, it likely denotes an internal testing build or a "B-side" compile. This suggests that "FILF 2 Version 001b Exclusive" was never meant for the general public. It was likely a build sent to a specific tester, a close circle of patrons, or a developer's backup that somehow slipped the leash.
: Version 0.01 is often treated as a public demo or an exclusive early-access build for supporters on platforms like Patreon . filf 2 version 001b exclusive
: Unlike the first game, FILF 2 features a completely new cast of characters and a new narrative. Usually, a "b" suffix stands for "Beta