The Game Theory / MatPat meme celebrates the high-energy and often absurdly detailed lore breakdowns of Matthew Patrick, host of the YouTube channel The Game Theorists. Known for his signature sign-off, 'But hey, that's just a theory! A Game Theory!', MatPat became an internet icon for his deep dives into video game mysteries, especially the Five Nights at Freddy's series. The meme typically features MatPat explaining a complex, convoluted, or outright ridiculous conspiracy—like his infamous claim that Sans from Undertale is actually Ness from EarthBound. It is used to mock over-analyzing simple things or to present a 'galaxy brain' explanation for any topic, ranging from video games to everyday life events.