Suppose there is a game, which was developed, like 15 years ago 8 (16 bit era); and today the developer aswell as the publisher are long gone because of bankruptcy.
Reading http://en.wikipedia.org/wiki/Abandonware
[quote]Definitions of “abandoned” vary; generally it refers to a product that is no longer available for legal purchase, over the age where the product creator feels an obligation to continue to support it, or where Operating Systems or hardware platforms have evolved to such a degree that the creator feels continued support cannot be financially justified. Software companies and manufacturers may change their names, go bankrupt, enter into mergers, or cease to exist for a variety of reasons. When this happens, product rights are usually transferred to another company that may elect not to sell or support products acquired.
In most cases, software classed as abandonware is not in the public domain, as it has never had its original copyright revoked and some company still owns exclusive rights. Therefore, downloading such software is usually considered copyright infringement, though in practice copyright holders rarely enforce their abandonware copyrights.
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The fact that, in this case some Company still holds the copyrights somewhere, seems highly unlikely to me. There is no existence of any company today, that was ever entitled to those copyright. They all died.
So if I use assets, sound, music whatnot, in my (non profit - not that it matters) game, who’s gonna sue me ?