Top 15 Unsolved Video Game Mysteries sources
http://www.redbull.com/en/games/stories/1331801609244/gamings-greatest-mysteries-top-10
http://fraghero.com/8-biggest-mysteries-gaming-still-remain-unsolved/
http://whatculture.com/gaming/10-unanswered-video-game-mysteries-that-have-totally-been-answered?page=3
http://www.unilad.co.uk/gaming/eight-of-the-biggest-mysteries-in-gaming/
http://gta-myths.wikia.com/wiki/Mount_Chiliad_Mystery
https://venturebeat.com/community/2012/01/19/5-perplexing-video-game-mysteries/
http://www.ign.com/boards/threads/super-mario-sunshine-the-mystery-book-the-story-so-far.26274775/
http://unrealitymag.com/video-games/10-of-the-most-widely-believed-video-game-urban-legends/
http://metro.co.uk/2014/03/21/7-video-game-secrets-you-need-to-know-about-4623923/
https://www.theguardian.com/technology/2015/apr/02/12-greatest-video-game-easter-eggs
https://www.gameraven.com/editorials/biggest-unsolved-mysteries-video-games
http://www.complex.com/pop-culture/2013/10/video-game-myths-conspiracy-theories-urban-legends-celebrate-halloween/majora
http://www.gamesradar.com/game-secrets-almost-never-found/
http://undertale.wikia.com/wiki/W._D._Gaster
https://en.wikipedia.org/wiki/Undertale
https://en.wikipedia.org/wiki/Rebecca_Chambers_(character)
https://en.wikipedia.org/wiki/Mew_(Pok%C3%A9mon)
https://en.wikipedia.org/wiki/The_Legend_of_Zelda:_Ocarina_of_Time
https://en.wikipedia.org/wiki/Batman:_Arkham_Asylum
https://en.wikipedia.org/wiki/Final_Fantasy_VII
https://en.wikipedia.org/wiki/Final_Fantasy_X
https://en.wikipedia.org/wiki/Adventure_(Atari_2600)