Rockstar San Diego, Inc., formerly known as Angel Studios, is an American video game developer headquartered in Carlsbad, California, and a wholly owned studio of Rockstar Games (a subsidiary of Take-Two Interactive). Founded in January 1984 by Colombian entrepreneur Diego Angel as a computer-animation and visual-effects house, the studio pivoted into game development in the early 1990s, was acquired by Take-Two Interactive in November 2002 for approximately US$41 million, and was thereafter rebranded as Rockstar San Diego (Wikipedia, 2026a). The studio is best known for leading the Red Dead and Midnight Club franchises, for stewarding the company-wide Rockstar Advanced Game Engine (RAGE), and, as of the development cycle for Grand Theft Auto VI (GTA VI), for operating as one of the principal contributing studios within Rockstar Games' unified, cross-studio production model. In January 2025 the studio also became the involuntary source of one of the most unusual GTA VI leaks to surface during the game's pre-release window (Phillips, 2025).
After Angel Studios' acquisition, Rockstar San Diego's headcount climbed from roughly 125 employees at acquisition to approximately 230 in 2003, before contracting to around 128 by February 2011 following post-Red Dead Redemption layoffs (Wikipedia, 2026a). The studio is currently co-led by studio heads Joshua Bass and Tom Shepherd, and houses the RAGE Technology Group, the internal team that has built and maintained the Rockstar Advanced Game Engine since 2004. RAGE underpins virtually every modern Rockstar release, including Grand Theft Auto IV, Red Dead Redemption, Max Payne 3, Grand Theft Auto V, Red Dead Redemption 2 and Grand Theft Auto VI, making the San Diego studio's engine work foundational to GTA VI even before any direct content contribution is counted (Wikipedia, 2026a).
Rockstar San Diego's pedigree as the lead studio on the Red Dead franchise is the single most important credential it brings into the GTA VI project. Red Dead Revolver (2004) originated as an Angel Studios/Capcom collaboration, was rescued by Rockstar Games after Capcom withdrew funding in 2003, and was shipped under San Diego's direction. Red Dead Redemption (2010), together with its Undead Nightmare expansion (2010), was developed primarily at Rockstar San Diego under intense crunch conditions that later attracted public criticism via the "Rockstar Spouse" open letter of January 2010 and a class-action overtime suit settled for US$2.75 million in 2009 (Wikipedia, 2026a). For Red Dead Redemption 2 (2018), Rockstar San Diego again served as the lead studio: preliminary work began shortly after the 2010 release, with a rough outline in place by mid-2011 and rough scripts completed by late 2012. Once Rockstar Games concluded that a distributed multi-studio model was insufficient for the scope it wanted, it "co-opted all of its studios into one large team, presented simply as Rockstar Games", to coordinate roughly 1,600–2,000 developers on RDR2 (Wikipedia, 2026b). This unified-studio model, pioneered for Red Dead Redemption 2, is the template under which Grand Theft Auto VI is being produced.
Rockstar San Diego's contribution to GTA VI operates on three overlapping layers. First, at the engine layer, the RAGE Technology Group based in Carlsbad continues to develop the proprietary engine that runs GTA VI, extending RAGE's rendering, physics, animation and streaming subsystems to handle the title's substantially larger Leonida (fictional Florida) open world. Second, at the production layer, San Diego operates as one of the integrated production hubs in Rockstar's "one team" pipeline first formalised on RDR2, contributing animation, vehicle systems, world-building and engineering tasks rather than functioning as a discrete co-developer (Wikipedia, 2026b). Third, at the platform layer, the studio physically hosts current-generation development hardware for GTA VI: photographic evidence from the January 2025 leak shows PlayStation 5 and Xbox Series X devkits, one labelled with a code beginning "SAND", on desks within the Carlsbad office (Phillips, 2025).
On 2 January 2025, Eurogamer's then–Editor-in-Chief Tom Phillips reported that a Reddit user, JustLovett0, had posted a still photograph and two short video clips that "look to have been taken inside Rockstar's San Diego office" and showed a computer monitor running what appeared to be GTA VI (Phillips, 2025). The image depicted protagonist Lucia standing beside a wall and crates, and was dated by the original poster to mid-2021 — roughly three and a half years before publication — with the caption "a photo from mid-2021. I think it's been long enough I can post this" (Phillips, 2025). Phillips noted that the image content itself was "essentially meaningless" as a gameplay leak, but that the office location was unusually identifiable: "What's shown of the office itself looks relatively generic, though it's clearly the Rockstar San Diego building based on the shape of the windows and frontage that can be seen outside. Desks nearby house PlayStation and Xbox developer kits, one of which is labelled with a code beginning 'SAND', presumably a reference to San Diego" (Phillips, 2025). Eurogamer's identification of the San Diego (Carlsbad) office, made by comparing the visible window geometry and the exterior frontage to publicly available imagery of Rockstar's Carlsbad headquarters, was subsequently corroborated by other outlets including Polygon and Push Square, both of which credited Eurogamer's geolocation of the photograph. The leak therefore did two things for the historical record: it visually confirmed that GTA VI was in playable form on PlayStation 5 development hardware at Rockstar San Diego by mid-2021, and it confirmed that Rockstar San Diego — long publicly associated only with the Red Dead and Midnight Club lines — is an active development site for Grand Theft Auto VI.
Rockstar San Diego enters the GTA VI project not as a peripheral collaborator but as one of Rockstar Games' most strategically important studios: it owns the engine (RAGE) on which GTA VI runs, it pioneered the unified multi-studio production model under which GTA VI is being built, and, as the January 2025 office leak inadvertently demonstrated, it physically hosts current-generation dev kits running playable GTA VI builds. The studio's transition from Angel Studios animation house to lead steward of two of Rockstar's flagship franchises positions it as a structural pillar of GTA VI's development, even where Rockstar Games' "one team" branding deliberately obscures individual studio credit.
Phillips, T. (2025) Bizarre GTA 6 leak appears to come from inside Rockstar's own office. Eurogamer, 2 January. Available at: https://www.eurogamer.net/bizarre-gta-6-leak-appears-to-come-from-inside-rockstars-own-office (Accessed: 14 May 2026).
Rockstar Games (2018) Red Dead Redemption 2 [Video game credits]. New York: Rockstar Games.
Wikipedia (2026a) Rockstar San Diego. Available at: https://en.wikipedia.org/wiki/Rockstar_San_Diego (Accessed: 14 May 2026).
Wikipedia (2026b) Red Dead Redemption 2. Available at: https://en.wikipedia.org/wiki/Red_Dead_Redemption_2 (Accessed: 14 May 2026).