A new rocket league game mode, Dropshot, was added in a March 2017 update. It takes place on an arena without any goals and a field made of hexagonal tiles, and uses a ball that becomes electrified after successful strikes or passes Rocket League Trading. Players use the ball to mark tiles on the opposing's side of the field while the ball is electrified; marked tiles are then removed from the field when the electrified ball hits them, or marked tiles in contact with it, creating a goal for the team. Once a team scores, the floor resets to normal.
Full development of Rocket League started around 2013 and took around two years and under $2 million to develop, though they had tested various prototypes of a Battle-Cars sequel in the years prior, including an unsuccessful attempt at pitching the game's idea to Electronic Arts in 2011. Psyonix used some of the feedback from Battle-Cars to fine-tune the gameplay in Rocket League.
A key requirement for Psyonix was to increase the game's frame rate from 30 to 60 frames-per-second, a known criticism from Battle-Cars and essential for newer hardware, according to Corey Davis, the design director at Psyonix. Hagewood recognized that Battle-Cars Rocket League Items was considered "too hardcore" with the game becoming too inaccessible to novice players against skilled ones. They eased up on some aspects to make it more approachable, such as by slowing the pace of the game and allowing players of all skill levels to reasonably compete against each other while promoting team-based gameplay.