Super Skyrim Bros is touted as a fan-made parody mod for the role play game Skyrim. The free mod for Skyrim is an extended a bonus quest that invokes the style of Super Mario Bros.
If you look at your map, you should see the new Super Skyrim Brothers Abandoned House Map marker next to Winterhold. Just travel to the Abandoned House, enter it, and read the note you'll see on the table. It'll warn you not to sleep in the bed, but disregard it and go ahead and sleep in the bed anyway. A dream sequence will be initiated once you fall asleep, and you'll be able to access the mod that way.
Super Skyrim Bros will let you enter a new mini-Kingdom to play in Skyrim. The Super Skyrim Bros mod won't affect anything outside of that specific Kingdom, meaning brick blocks, question blocks, and Super Skyrim Bros enemies won't exist anywhere but in this specific world.
You will find a box of costumes to wear that are reminiscent of Super Mario Bros. Your goal in Super Skyrim Bros is to rescue Princess Toadstool and take out enemies like goombas as you go. It's a fun mod to have installed, particularly for old school Nintendo players.
To make use of Super Skyrim Bros, you'll need to have the full version of Skyrim installed. Just unzip the file and copy the contents into your Skyrim game folder. It's a pretty simply process, especially if you've installed other mods before.
Super Skyrim Bros is a fun way to immerse yourself in both the RPG elements of Skyrim and old school Nintendo action simultaneously.