ZombiU is the Wii U's extremely difficult survival horror first-person shooter. You're not supposed to be able to make it through it in one life, though the game's Survival mode challenges you to do that.
A few brave souls have cleared Survival mode. About 13 of them so far, it seems. Most of them have been praised by the developers—in the game. One of those ZombiU daredevils is schoolteacher Eric Beasley, known as DeDeDe on the Wii U's MiiVerse and on the ZombiU leaderboard.