For detailed information about this series, see: Year of Luigi at Super Mario Wiki
While Luigi is playable in all games in the Mario Bros. sub-series and some other Mario games, the first game to star Luigi in the leading role was the educational game Mario is Missing, but since it's not titled "Luigi" and it still features Mario in a supporting role, it's not considered an actual part of the Luigi series.
The actual games titled after Luigi are:
- Luigi's Mansion (September 14, 2001), GameCube.
- Luigi's Mansion 2 (March 20, 2013), Nintendo 3DS. Known in North America as Luigi's Mansion: Dark Moon.
- New Super Luigi U (June 19, 2013), Wii U. Originally released as an expansion pack to New Super Mario Bros. U, it was later released as a stand-alone game.
- Dr. Luigi (December 31, 2013), Wii U download.
- Luigi's Mansion Arcade (Summer 2015), Arcade.
The Mario & Luigi sub-series while also titled after Mario, can be considered part of the Luigi series:
- Mario & Luigi RPG (November 17, 2003), Game Boy Advance. Called Mario & Luigi: Superstar Saga outside Japan.
- Mario & Luigi RPG 2x2 (November 28, 2005), Game Boy Advance. Called Mario & Luigi: Partners in Time outside Japan. Re-released for WiiU Virtual Console in 2015.
- Mario & Luigi RPG 3!!! (February 11, 2009) known as Mario & Luigi: Bowser's Inside Story outside Japan.
- Mario & Luigi RPG 4: Dream Adventure (July 12, 2013), Nintendo 3DS. Known as Mario & Luigi: Dream Team outside Japan.
- Mario & Luigi: Paper Jam (Spring 2016), Nintendo 3DS. A crossover with the Paper Mario series.
Additionally many merchindising items dedicated to Luigi was released througout 2013 in an event called "The Year of Luigi", commemorating the 30th anniversary of Luigi's debut in Mario Bros., including a Luigi-themed Nintendo 3DS XL and a music CD titled The Year of Luigi Sound Selection including music tracks from Luigi games as well as Luigi themes from Mario games.
Links to other series
Note: only references to Luigi as the hero from his own series are listed here, references to him as a Mario character are listed in the Mario series.
Also note that references in or to the Mario & Luigi sub-series are currently not listed here.