The opn file extension is associated with the Strip Poker, a card computer game for Microsoft Windows, developed by Rebel Software.
The opn file stores opponent data used by Strip Poker.
This video game contains adult content.
How to open:
The *.opn files are used for internal purposes of Strip Poker.
How to convert:
As far as we know, this .opn file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.