10 Video Game Mini-Games Discovered YEARS Later
9. Halo Kart - Halo 5: Guardians
Secret mini-games don't get much cooler than this, and the Halo fandom collectively lost their s**t when, in 2021, some six years after the release of Halo 5: Guardians, a Mario Kart-esque racing mini-game was discovered.
In April 2021, one of the game's designers, Patrick Wren, revealed that there was a "Halo Kart" mini-game hidden in Halo 5's mission "Evacuation" - a race which could only be accessed while playing four-player co-op, with the winner of the race getting a random heavy weapon for their efforts.
Wren provided a few more hints to players, who soon enough discovered that, near the start of the level, there's a door which players must stand by for a total of 117 seconds, after which they'll all be teleported into Mongooses and be able to race one another through the area.
As secret mini-games go this one is rather polished and fun, in large part because it's simply using the game's existing driving mechanics, albeit in a totally unexpected way.