Wii Play is a Wii set of minigames bundled with a Wii Remote. Released on launch day in Japan and Europe, but not until February in North America.
NPD counts it as a video game, although others argue it should be counted as an accessory as Link's Crossbow Training is, which included the Wii Zapper peripheral.
As of May 2008, Wii Play has been in the Top 10 chart for 16 consecutive months.
Wii Play sales
WII PLAY W/REMOTE U.S. monthly sales February 07 - 371K March 07 - 273K April 07 - 249K May 07 - 227K June 07 - 293K July 07 - 278K August 07 - 257K September 07 - 282K October 07 - 240K November 07 - 564K December 07 - 1.1 million January 08 - 298K February 08 - 290K March 08 - 410K April 08 - 360K May 08 - 295K LTD - 5.8 million