Premise: Rocket League is a vehicular soccer video game developed and published by Psyonix. The game was first released for Microsoft Windows and PlayStation 4 in July 2015. Ports for Xbox One, OS X, and Linux were released in 2016, and a port for Nintendo Switch is expected in late 2017. 505 Games began distributing a physical retail version for PlayStation 4 and Xbox One in June 2016.
Hypothesis: from june 2016 their was a physical retail version released