When speaking with Kotaku, Reggie Fils-Aime has confirmed that Wii U will have system-level achievements like the Nintendo 3DS and its Mii Plaza Accomplishments. Fils-Aime said that Nintendo is giving developers the choice of whether they want to implement an achievement system in their games. In other words, a Wii U game is not required to feature a system of achievements.
Nintendo has put an Achievement-like system in the 3DS, mostly to reward people for feats involving the system’s Street Pass networking system. In other words, the system itself has Achievements. “We will have that,” Fils-Aime said. “Once you start getting into game-specific [Achievements] that’s developer driven.” Microsoft may require every game to have Achievements, but, Fils-Aime said, “That is not our philosophy.”
SOURCE:
http://mynintendonews.com/2012/06/11/wii-u-will-feature-an-ac...