Multiple games share this name, including a browser-based tactical RPG. Version 1.0 would typically be an initial release or a legacy build often hosted on Internet Archive or community Scribd "troves."
Always scan suspicious files using a service like VirusTotal before opening. Potential Contexts Dungeoneers.v1.0.rar
It is likely this file refers to one of the following, which are often archived or shared in similar formats: Multiple games share this name, including a browser-based