One of the most beloved video games in history has been refreshed in a new mashup that gaming fans of all shapes and sizes need to download immediately. The title is “Mari0″ and simply stated, it’s Super Mario Brothers meets Portal. Game developer Maurice Guegan is the man behind Mari0, and he built the title from the ground up. It features a start to finish recreation of Nintendo’s original Super Mario Brothers game, adds a portal gun that shoots portals through which Mario can travel as in the popular PC game “Portal,” and mixes in a 4-player cooperative mode along with several additional features. The result is an addictive game that does a better job adding a new twist to an old classic than anything we’ve seen in recent history. Mari0 is free and open source, and it is available immediately for Windows, OS X and Linux PCs. A trailer video follows below, as does a link to a download that will ensure your Monday is completely unproductive.