They said it didn't exist. They said it couldn't be found. They said it might just be a myth. Oh, but it exists—out there, in the spoilery land of spoilers.
Okay, so. For the longest time, Grand Theft Auto players have searched for Bigfoot in older titles in the franchise. Just like real life, there are a lot of stories, lots of myths, and even blurry, likely fake pictures.
But now? Now there's footage that Bigfoot exists...on GTA V, at least. RocketofRice obtained the footage that's proof—you, too can see it on a mission called "Predator" in GTA V. (This video has a more clear shot of Bigfoot, but its thumbnail also says BIGFOOT on it, and I didn't want to spoil people...also, it's proof this isn't a fluke, since footage is coming from multiple sources.)
Still skeptical? Here are some stills, courtesy of OscarTheSwede.
Players report that Bigfoot tends to disappear right away, so you have to be quick.
And there you have it. Bigfoot exists, and you can see him if you're on the appropriate mission. But then again, Los Santos hides things like aliens in it too, so, there you go.