Arms Race was the sixth game mode introduced into Smash Karts, in 2025. In Kart Krusher, the objective is to smash other players as the Kart Krusher, which you become by collecting the keys, gain points by smashing others as the Krusher and the player with the most points, wins. Most public Kart Krusher games will have a maximum of 12 players.

Kills, Deaths, Bot Kills and Wins earned in Kart Krusher will not go towards your statistics, while Games do.

In Arms Race, you gain:

10 Coins and 10 XP (30 XP if you have 3x)  per player you smash