Just a few months after its initial launch, Mario Kart World is revving up for its first-ever Mario Kart World Open online competitive racing event, which is set to kick off on September 27. This brand-new Mario Kart World experience follows in the footsteps of previous online tournaments for Mario Kart 8 Deluxe on the Nintendo Switch, with the September 2025 Mario Kart World Open kicking things off as the first official online racing event for the Switch 2.

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Released on June 5, Mario Kart World is the latest installment in the iconic Mario Kart video game series, which sees players racing around colorful tracks and using unique items to battle it out against the familiar faces of Super Mario Bros. And other Nintendo franchises. The introduction of online gameplay on Nintendo consoles has fostered special opportunities for fans to compete against fellow players across the globe, and the upcoming debut of the Mario Kart World Open may be the first in a new series of competitive events for Mario Kart fans.

mario kart world is being outsold by mario kart 8 deluxe.
Mario Kart World is Being Outsold by an 8-Year-Old Racing Game

Nintendo's latest first-party racing game, Mario Kart World, sees a slowdown in sales as an older game in the same genre outsells it.

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How to Join the Mario Kart World Open September 2025

  1. Must have a Nintendo Switch Online membership and Nintendo Account to participate
  2. Open Mario Kart World from the Nintendo Switch 2 home screen menu
  3. Select Online Play
  4. Press the - Button to search for an event
  5. Enter the 4-digit Event ID: 3906
  6. Event runs from 12pm PT to 6pm PT on September 27, 2025

The official Nintendo Versus account unveiled the premiere of the Mario Kart World Open, which will run from 12pm PT to 6pm PT on Saturday, September 27. Players will be able to join the event via the Online Play option within the Mario Kart World game. The online event is touted as a "just-for-fun" experience, where players can showcase their talents in light-hearted competitive racing action against fellow fans. There will be no prizes on offer, but interested racers can hone their skills by testing the lineup of vehicles and characters in Mario Kart World and finding their ideal build to reach the top of the podium.

Since the game's release, fans of the Mario Kart 8 Deluxe tournaments have been keeping their fingers crossed for competitive online events to be on offer for Mario Kart World. Now that those hopes have been answered, players are optimistic that even more may be in store for Mario Kart World, though it remains to be seen if and when another Mario Kart World Open may be coming.

Mario Kart World Japanese Physical Sales Pass Major Milestone

Nintendo Versus events have been a smash hit for fans of games like Mario Kart and even Splatoon, with the latter's Splatfest competitions among the most popular online Nintendo contests. With the brand-new Mario Kart World Open pulling out of the gate on September 27, critics and audiences alike are keeping an eye on how this event may shape the future of Mario Kart World.

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Mario Kart World
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Racing
Open-World
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Systems
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Top Critic Avg: 87 /100 Critics Rec: 97%
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Released
June 5, 2025
ESRB
Everyone // Mild Fantasy Violence, Users Interact
Developer(s)
Nintendo
Publisher(s)
Nintendo
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WHERE TO PLAY

DIGITAL
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Genre(s)
Racing, Open-World