

This has led to a practice of makers of Nintendo fan games especially just going quiet or not announcing their games until the things are done, then dumping them in a sudden burst release before vanishing. I say "ostensibly", because in actual reality they don't actually need to do it to maintain the control and ownership of their properties they're apparently so worried about losing.

This is largely because of the often highly-publicised heavy-handed enforcement bullshit of Nintendo, who regularly make the news for discovering and striking down incredibly promising fan games willy-nilly, ostensibly in the name of protecting their properties. They have existed for as long as videogames have, and their place and presence in the industry varies considerably depending on whose work the fan work is derived from some of the medium's finest art or most influential works started as fan works, or indeed still are fan works, but the ensnaring poisons of IP law, copyright and trademark enforcement, and the myriad myths about the requirements thereof have pushed them into an "underground" status, almost. Fan games are an interesting subject in the medium of videogames, as "fan works" tend to be in art as a whole.
