: Stands for Blu-ray rip, indicating the source material is of high quality, ripped directly from a Blu-ray disc. This usually ensures a good balance between file size and video quality.

There is no official "A9" version of Prometheus . The most likely interpretation:

The A9 Prometheus 1080p Special Edition Fan Edit BRrip x264 AAC-M2G represents the pinnacle of fan creativity and technical skill. It not only showcases what can be achieved with dedication and passion but also underscores the enduring appeal of science fiction, particularly films like Prometheus that invite discussion and reinterpretation.