: Indicates this is the second volume of a multi-part RAR archive. You would need all other parts (part1, part3, etc.) to successfully extract the contents. What is likely inside?

: This frequently stands for "Trailer," "Tracker," or a specific language code like "Turkish," depending on the context of the site it was hosted on.

: Often used by release groups as a shorthand for "Good Game" or as a signature for the uploader/group.