Most Mario and Luigi games are only available on Nintendo consoles and handheld systems, but there are a few exceptions. The core gameplay of the series involves jumping over obstacles and defeating enemies to get through levels.
Most of the games starring Mario and Luigi require a Nintendo console or handheld to play. As of March 2015, the Wii and Wii U consoles offer the greatest range of options for playing these games. In addition to their own contemporary Mario games, these consoles offer a number of games from previous generations for digital download through the Nintendo eShop. The Wii U can also play Wii games, whereas the Wii can play Gamecube games.
A few exceptions to the Nintendo-only rule are "Hotel Mario" on the Philips CD-i, "Mario is Missing" for PC and a handful of arcade games.
The rules and techniques for playing each game vary greatly. Most of the core Mario and Luigi games belong to the platformer genre, which involves jumping on platforms and exploring levels. In addition, there are a number of racing, sports and educational Mario and Luigi games, such as the "Mario Kart" and "Mario Golf" series. These games belong to the sports genre.