Rocket League’s development budget was under $2 million, according to Wikipedia. That figure covers the game’s full development, which began around 2013 and lasted roughly two years.
The project grew from Psyonix’s 2008 PlayStation 3 game, Supersonic Acrobatic Rocket-Powered Battle-Cars. The studio used feedback from that earlier title to make Rocket League more accessible, improve its online features, and raise performance from 30 to 60 frames per second.
Psyonix was a relatively small independent developer, and contract work on larger games—including Mass Effect 3—helped fund Rocket League. The team also tested several ideas, such as power-ups, mini-games, and an open-world structure, before focusing on the core car-soccer formula.
A common mix-up is treating the figure as exactly $2 million. Wikipedia’s wording is “under $2 million,” so the number is an upper limit rather than a precise disclosed budget. The game later became a major commercial and esports success despite its modest production cost.