Because is not a mainstream commercial title, speculation about its contents falls into three categories:
The extension .rar is the Roshal Archive. In the late 1990s and early 2000s, before .zip became ubiquitous across all operating systems and before high-speed internet made file compression less critical, .rar was the gold standard. It meant the file was compressed heavily to save bandwidth. Finding a file with this extension today immediately suggests it is an older file, likely dating back to an era when every megabyte counted. Hot-Spring-Hero.rar