Ah geez there are some keen and very very clever peeps out there!
This Cursed Halo Kart mashup of Halo and Mario Kart is based on the Cursed Halo Again mod created by modder and Steam user InfernoPlus.
Just like in Mario Kart, players race around the track in their Halo modded vehicles, trying to win by all means, including shooting each other! This is our kind of Mario Kart game 😉
story source: technabob