Abandonware

There are five general categories of abandonware:

• Software that is technically owned by a company but no longer supported by game systems
• Software that was copyrighted by a company that has since gone out of business
• Shareware, which is provided to users for free or on a trial basis by the copyright owner
• Unmaintained shareware
• Open source programs that have been abandoned by their creators

None of these kinds of abandonware are legal to reproduce without permission from their owners or copyright expiration.