When Nintendo announced the price drop of the 3DS, and that current owners would get 20 free downloadable games, one of their statements didn’t instantly make sense.
In relation to the 10 free NES games people would receive, Nintendo said that they would be up for downloading in September, and then “updatable for free” at a later date.
Speaking to Nintendo, IGN was told that the early free versions of those NES titles will be bare-bones versions. Later, when NES games are open to all, the games will include options such as local multiplayer support.
Options like that won’t be in those early versions, so that’s why the 10 free NES titles will offer updates later.