Files with irk file extension can be found as game packages from iArcade software from Brooklyn Games.
IRK file extension - iArcade game package
What is irk file? How to open irk files?
File type specification:
The irk file extension was used in old iArcade gaming software from Brooklyn Games.
The irk file is a game package used in iArcade. Looks like the company is no longer in business and the program is discontinued.
This irk file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.