Mario Kart Live: Home Circuit

Mario Kart Live: Home Circuit is an installment in the Mario Kart series for the Nintendo Switch announced as part of the 35th anniversary of Super Mario Bros. The game makes use of physical kart products of Mario and Luigi with a camera attached to the back of the kart, which live streams the surrounding area to the player's Nintendo Switch. Mario Kart Live: Home Circuit released worldwide on October 16, 2020.

Creating an ID card for the game was one of the related My Nintendo missions for the Super Mario Bros. 35th Anniversary (though purchasing the game itself was not necessary to complete it).

Gameplay
To set up a course, the player has to place the four gates around the room. Lakitu will come down and paint the kart, and the player has to then drive through the gates, marking how they want the course to appear on the screen. The appearance can be from a simple loop to a curvy track through their furniture. The gates can also be customized, having Item Boxes, Boosts, or hazards. The controller connects to the kart product and controls it, similar to an RC Car. Items affect the kart product when used, such as Mushrooms making the toy move faster or a Koopa Shell making the toy stop momentarily. Using augmented reality, items, Bowser Jr. and the Koopalings appear on the player's screen, as well as the second player's kart.

Explore Mode
Explore Mode is the mode the player starts off in. Here, they are free to drive around and are able to customize gates. Any items collected in this mode will always be Mushrooms, Triple Mushrooms, Golden Mushrooms, or Stars. Stopping in front of Gate 1 and pressing will call Lakitu and bring up the menu for the other modes. The previous race created can be viewed in this mode.

Grand Prix
The player can compete against CPU opponents in cups, in which trophies can be obtained. There are four different engine classes: 50cc and 100cc are available from the start, while 150cc and 200cc are unlocked when the player has collected a trophy on respectively 5 and 10 different cups. When the player has collected a trophy on 15 different cups, they will unlock Mirror Mode. Each race in Grand Prix is five laps long, regardless of how long or how short the player makes the race.

Time Trial
In Time Trial, the player has to complete their course in the fastest time possible. The player can change the kart speed, the number of laps (3, 5, or 7), the music that plays, and the environment to play their course in. After creating the course, the player will then have to race through it as fast as they can, and the customized gates are taken into account. The only items that can be obtained in this mode are Mushrooms. After racing, the player has the option to keep the current course or change it; changing it will result in inaccurate times and ghost data, which the player is also given the option to clear for a new race. Any coins earned will count toward unlocking a new kart customization.

Custom Race
The player can create courses using their own rules. The player can change the kart speed, the number of laps (3, 5, or 7), the music that plays, and the environment to play it, and the customized gates are taken into account. After creating the course, four random Koopalings will come down for the player to race against. Any coins earned will count toward unlocking a new kart customization.

Playable

 * Mario
 * Luigi
 * Outfits

Allies (Relay Mode)

 * Princess Peach
 * Toad
 * Yoshi

Opponents

 * Bowser Jr.
 * Ludwig von Koopa
 * Larry Koopa
 * Lemmy Koopa
 * Wendy O. Koopa
 * Morton Koopa Jr.
 * Iggy Koopa
 * Roy Koopa

Other

 * Lakitu

Karts

 * CPU drivers only
 * Koopa Clown

Courses
There is also a Random Cup, which includes 3 courses with randomized environments and gate features.

Ver. 1.0.1
Release date: October 27, 2020  
 * General Fixes
 * Adjusted kart camera settings to allow for improved play in indoor areas with bright light, such as direct sunlight.
 * Kart update will occur upon connecting kart, after the software has been updated.

Ver. 1.1.0
Release date: July 1, 2021  
 * "Mario Cup" has been added to "Grand Prix". Fulfill certain conditions in "Mario Cup" and receive three new "Environments" and a "Gate" to use in course creation.
 * "Super Yoshi" and "Yoshi Horn" have been added to the kart designs in the game. Unlock them by fulfilling certain conditions in Mario Cup.
 * Made general changes to improve enjoyment of the game.

Ver. 2.0.0
Release date: November 17, 2021  
 * Additional Features
 * Luigi Cup was added to Grand Prix. Fulfill certain conditions in Luigi Cup to acquire two new Environments and three new Gate Types to use in Course Creation.
 * The POLTERGUST G-00 and SPOOKY HORN have been added to Kart Customization in game. Acquire them by fulfilling certain conditions in Luigi Cup.
 * Relay Race was added to Multiplayer. This is a cooperative mode where up to four players take turns driving one kart, playing as Princess Peach, Toad, Yoshi, and Mario/Luigi (depending on the kart used) against Bowser Jr., and the Koopalings.
 * Enough controllers to match the number of players is required to play Relay Race.
 * Split Screen was added to Multiplayer. Connect two karts to one Nintendo Switch console, to play together at the same time. The video feed from the karts will be divided onto the screen, allowing two feeds to be displayed at once.
 * Playing Split Screen requires two karts, and two Joy-Con, or Pro controllers.
 * General Fixes
 * Adjustments made to enhance the play experience of the game.

Reception
Mario Kart Live: Home Circuit received generally positive reviews. In most cases, the unique gimmick of the game was praised, along with the more independent concept offered. However, certain factors, such as the boundaries of a player's actual living area, were mentioned. Two different reviews mention Mario Kart 8 Deluxe as being an ultimately superior, though just as intriguing, installment.

Sales
By December 31, 2021, the game had 1.58 million downloads worldwide.

References to other games

 * Super Mario Bros.: The retro environment uses 8-bit sprites from this game.
 * Super Mario Bros. 3: Part of the music that plays when Bowser Jr. and the Koopalings appear on the track is based on the "Fortress Boss" theme from this game.
 * Dr. Mario series: The Doctor Outfit of Dr. Mario and Dr. Luigi reappears.
 * Mario Kart: Double Dash!!: The Chain Chomp returns as an item. In the rainbow environment, Stars can fall from the sky onto the track, like in the Rainbow Road from this game. The Turbo Yoshi reappears as a kart in the 1.1.0 update.
 * Super Mario Galaxy: The beginning of the music that plays when Bowser Jr. and the Koopalings appear on the track is based on the "Enter Bowser Jr." theme from this game.
 * Mario Kart Wii: The Spiny Shell appears in its winged form for the first time since this game.
 * New Super Mario Bros. 2: Gold Mario appears as unlockable content.
 * Mario Kart 8 / Mario Kart 8 Deluxe: Many assets are reused from this game, including models and music. The Koopa Clown reappears. In the rainbow environment, the boost gates from appear.
 * Super Mario Maker: Builder Mario reappears.
 * Super Mario Odyssey: Many outfits from this game reappear as unlockable content, with various outfits being also used on Luigi with adjusted proportions and color schemes.
 * Super Mario Maker 2: Builder Luigi reappears. The Twisters reappear as obstacles in the Blizzard environment.
 * Mario Kart Tour: The Super Yoshi retains most of its redesign from this game. The stickers are based on the badges from this game.
 * Luigi's Mansion 3: The Poltergust G-00 is based off the vacuum model of the same name in this game.

References in other games

 * Mario Kart Tour: A commemorative badge of Mario in the Standard Kart with its design from this game was available during the 2020 Mario vs. Luigi Tour. Luigi's Painter Outfit and Knight Outfit return as standalone playable characters named Luigi (Painter) and Luigi (Knight) respectively.

Staff
Mario Kart Live: Home Circuit was developed by Velan Studios. Shinya Takahashi served as the general producer of the game, while Kosuke Yabuki, one of the key staff of the Mario Kart series, served as a supervisor. The game's original music was composed by Ryo Nagamatsu, who previously composed for Mario Kart Wii and Mario Kart 8.