Psyonix Studios is an independent game company started in North Carolina but later moved to San Diego, CA after the release of their first fully developed in-house game, Supersonic Acrobatic Rocket-Powered Battle-Cars, on the Playstation Network.
The company's initial work was to serve in the role of a contract assistant developer for larger scale "Triple A" games. Their speciality was the Unreal Engine in terms of both code optimisation and debugging as well as the creation of new content. Founder Dave Hagewood, and team, contributed to the development of games such as Gears of War, Unreal Tournament III, and pioneered the Onslaught mode in Unreal Tournament 2004 (of which received high critical praise for innovation within the franchise).
Alongside their contract work the team also worked on prototyping and developing their first own fully in-house project, the first of which (Supersonic Acrobatic Rocket-Powered Battle-Cars) released exclusively on the PlayStation 3 in 2008. While continuing their contract work on games such as Bulletstorm, Homefront, Mass Effect 3 and XCOM: Enemy Unknown the team also developed and published A.R.C. Squadron before solely focusing the studio on the development of the sequel to Supersonic Acrobatic Rocket-Powered Battle-Cars, Rocket League, which released in 2015 on the PlayStation 4 and PC before releasing on the Xbox One in the following year.
With the cancellation of Nosgoth by publisher Square Enix the company shifted their focus to the continued development of Rocket League which due to the game's massive success the team viewed as ideal opportunity of a "games as service" game. Hence the team's development efforts were shifted to focus on the continued expansion of that game through the addition of new speciality modes and themed and sponsored cosmetics within the game.