We've always thought of Master Chief as the savior of humanity in the Halo series, but the ARG kicking off for Halo 5: Guardians posits something much sinister: he's a traitor.

What's an ARG? It stands for alternate reality game, and usually means it sends fans chasing from one end of the Internet to the other to crack codes and unlock story secrets.

It's fun when game companies find a way to spice up marketing campaigns, and the Halo series has a rich history of involving fans. Remember I Love Bees? That one involved pay phones! Do pay phones still exist? (I know that pay phones still exist.)

A Soundcloud profile recently went up called HUNTtheTRUTH, and features Keegan-Michael Key, half of Comedy Central's Key & Peele, portraying journalist Benjamin Giraud writing a profile on Master Chief. Giraud, once a fan of the Chief, finds himself questioning everything.

Is it possible everyone has it wrong, and Chief is really the good guy?!

The clip itself is only a few minutes long.

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Since this is labeled episode "00," we should probably be hearing some more in the near future.

Folks on the Halo reddit are digging into the other pieces, which include a bunch of words secretly embedded into this trailer:

...and connecting the dots of a star map that's been littered about in several different places:

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Hmm.

While I've played all the Halo games, I've only dipped my toes into the lore.

We don't know much about the story for Halo 5: Guardians, but that's probably going to change in the near future. From what's been teased so far, it seems like Master Chief might be on the run this time around. The last game was a more personal story, and this seems to continue that.

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You can reach the author of this post at patrick.klepek@kotaku.com or on Twitter at @patrickklepek.