Fics like The Many Worlds Theory.

Naruto intends to travel back in time to save his Village. Unfortunately for him, the line between time travel and dimension hopping is paper thin, and he might have accidentally torn across it. So what's a man to do, when the world he knows is gone, alternate versions of the people he loves are suffering, and a mysterious red-headed stranger keeps following him? Time is a fickle thing, something a battle weary Naruto is quickly learning as he forms alliances with faces old and new, all the while desperately trying to stop this world from turning into his. OR Naruto tries to stop things from going to shit before it's too late, but finds that hard to do when things are so different from the world he left behind.

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