Quote Linux version should arrive somewhere before Dec 31st.

Article taken from GamingOnLinux.com.

A forum post from one of the Rocket League team has stated that the game will be on Linux before the end of December.Taken from here I do wonder what's holding it up, as they stated at the start of November that it was almost ready, but what that means to a developer is probably quite different to our expectations.Soccer meets driving once again in the long-awaited, physics-based sequel to the beloved arena classic, Supersonic Acrobatic Rocket-Powered Battle-Cars!A futuristic Sports-Action game, Rocket League, equips players with booster-rigged vehicles that can be crashed into balls for incredible goals or epic saves across multiple, highly-detailed arenas. Using an advanced physics system to simulate realistic interactions, Rocket League relies on mass and momentum to give players a complete sense of intuitive control in this unbelievable, high-octane re-imagining of association football.I can't wait to give it a go, so hopefully I will be able to dedicate some time to it when it arrives now I'm finally getting through some of my backlog.