Niche

Whether intentional or not the Niche tag to game titles is the kiss of death in regard to mass market success. These games appeal to only a small segment of gamers. By no means is this bad for gamers because usually those within the "niche" become die hard fans. Very rarely does a game developer ever set out to make a niche title. In almost all these cases the game is a labor of love for a someone like the producer or designer for said video game. Niche by no means is limited to games, they can also be as broad as games within a genre like the RTS genre.

Examples (please add)

 * Phantom Dust - The creator can be quoted as saying, "I made this for hardcore gamers"
 * RTS
 * Katamari Damacy
 * Metal Slug series