I hear that some of you aren’t playing Marathon yet. Maybe extraction shooters aren’t your jam, or there’s not enough about Bungie’s game to draw you away from your shooter of choice, or maybe you’re just sick and tired of a certain portion of the internet yammering on about Marathon like it’s the bee’s-freaking-knees of multiplayer games. Now, if you fall into that latter camp, I have particularly good news for you. For one week only, you will be able…