The headline is ten courses from Super Mario Kart on the SNES: Mario Circuit 1, 2 and 3, Ghost Valley 1, 2 and 3, Choco Island 1 and 2, Vanilla Lake 1 and Koopa Beach 1. They run as standalone races, and instead of item boxes they use the original game's question-mark panels on the road, which is a nice touch if you grew up with the 1992 version. They're flat and they're short, which is exactly what you want when a seven-year-old is losing patience with a three-lap Rainbow Road.

Knockout Tour gets two new routes, Propeller Rally and Turnip Rally. There's a new Spectator Mode for online and LAN rooms, so the person who got knocked out can watch the rest instead of staring at a menu, and rooms now go up to 26 people with 24 actually racing. Time Trials show your lap times now, not just the total, and Nintendo's notes list a round of item and balance changes plus bug fixes.

It's free, it's version 1.8.0, and it went out on 9 September US time, so most consoles will have pulled it down overnight. If yours hasn't, highlight the game on the home menu and check for a software update.