You get an awesome smashup while making Super Mario possibly the easiest game ever.

Saving the princess has never been easier when armed with Aperture Science Portal gun.

This is not just a video that fans made just for laughs, it’s an actual game in development called Mari0 which will be released for free along with its source code. Mari0 also promises Portal-infused levels from the original SMB and many of its sequels as well as simultaneous multiplayer, like Portal 2.