Fan made games can be great alternatives if you've played all of what you can of the series that it came from. In fact, we have some here on the site. Today we'll be discussing about fan made games that fans of the official games need to try out.
The Legend of Zelda: Timeless Haven is a 2D adventure with detailed enviroments. Timeless Haven is Zelda Universe's Official Fangame.
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Project AM2R is a Metroid fan made game that is actually still undergoing development and it's an awesome Metroid game at that!