Super Mario Bros and a Portal gun seemed like the most amazing, yet impossibly lucid pipe dream? As it turns out, the cake named "Mari0" by developer-house Stabyourself actually wasn't a lie. But lest you thought this just a redo of Super Mario Bros with a skosh of Aperture science thrown in, you'd be oh-so-wrong. How's about four-player co-op, in addition to a level editor and a bevy of hilarious modes that'll put a new twist on an old favorite. And could it get any better than available for the sweet sweet price of free? If that's not a ringing endorsement, we don't know what is. If you're still reading this, we're unsure why you're still here -- get your game on at the source link below.