: Identifies the series and specifies Episode 2 .
: This likely refers to Anaglyphic Contrast Balance , a production method used to balance color and contrast for 3D or high-fidelity depth perception. Alternatively, in some Australian digital contexts, it can indicate a rating or classification by the Australian Classification Board (ACB) . Futoku_no_Guild_02_Pro_ACB.mkv
The file name follows standard digital media conventions used by fansubbing or release groups: : Identifies the series and specifies Episode 2
: Digital releases of this type often include the original Japanese audio with embedded English subtitles. in some Australian digital contexts