Which two-dimensional mobile spin-off of Rocket League was released in late 2021?

The two-dimensional mobile spin-off released in late 2021 was Rocket League Sideswipe. Psyonix designed it as a mobile reinterpretation of Rocket League’s car-soccer concept for Android and iOS.

Sideswipe preserves the central objective: players drive rocket-powered cars, hit a ball, and try to score against opponents. Its major structural change is the switch from the main game’s 3D arenas to side-on, two-dimensional play, which suits touchscreens and shorter mobile matches.

The game’s development began in April 2018 with what its developers described as a very small team. An alpha version appeared in Oceania in March 2021, followed by a worldwide release on November 29, 2021. It was free to play and included both single-player and multiplayer modes.

Players sometimes confuse Sideswipe with Rocket Racing, another Rocket League-related title, or assume it is simply a mobile port. It is instead a distinct spin-off with different presentation, controls, and gameplay spaces, while retaining the recognizable vehicles, ball, goals, and competitive structure.