Grassrivers, the flooded wetlands region of Rockstar Games' upcoming Grand Theft Auto VI, occupies the southern interior of the fictional State of Leonida, spanning portions of Vice-Dale County and Mariana County. Inspired by Florida's Everglades and named after Marjory Stoneman Douglas's seminal 1947 ecological study The Everglades: River of Grass, the region has been pitched by Rockstar's promotional website as "the untamable jewel of Leonida's crown," a "primordial expanse" where "you never know what lies beneath the surface" (Rockstar Games, 2025, cited in GTA Wiki, 2025). Although the gators are flagged as the most famous attraction, the marketing copy openly warns of "far deadlier predators and weirder discoveries among the mangroves" — language that positions Grassrivers less as a tourist sideshow and more as a swampy noir backdrop with strong tonal echoes of Peter Weir's 1986 film The Mosquito Coast (Wikipedia, 2026a).
Peter Weir's The Mosquito Coast, adapted by Paul Schrader from Paul Theroux's 1981 novel and starring Harrison Ford as the manic inventor Allie Fox, is a dystopian jungle drama in which an American family's flight from consumerism into the Central American rainforest collapses into paranoia, religious schism, ecological pollution and violence (Wikipedia, 2026a). Its visual grammar — humid foliage, makeshift settlements perched on stilts above black water, distant gunfire from unseen armed factions, missionaries, drifters and a river system that simultaneously offers escape and entrapment — has become shorthand for a particular sub-tropical noir mode. Rita Kempley, writing in the Washington Post, captured the film's central tension when she observed that "sooner or later a man of invention will pollute paradise, a grand contradiction that gives Mosquito its bite" (cited in Wikipedia, 2026a). That contradiction — Edenic surface, rotten underbelly — is exactly what Rockstar's Grassrivers copy invokes when it cautions players about what "lies beneath the surface" (GTA Wiki, 2025).
Crucially, GTA IV had already foreshadowed this tonal register a decade and a half earlier, when the in-game travel parody Leftover-vacations.com described the Vice City hinterland as "a swamp full of right-wing nutjobs and deadly mosquito-born diseases" that "makes [Leonida] great" (Rockstar Games, 2008, cited in GTA Wiki, 2025). The retroactive joke now reads as a deliberate seeding of the Mosquito Coast vibe: militia paranoia, disease-carrying insects, the Florida Man meme, and the sense that the wetland is a lawless interzone outside Vice City's neon glare (Wikipedia, 2026b).
Grassrivers was first named in the September 2022 teapotuberhacker leak, on an in-game interpretive sign titled "Energy in the Grassrivers" that explained the wetland's ecosystem (GTA Wiki, 2025; Wikipedia, 2026b). It then surfaced officially in Trailer 1 (December 2023), where two consecutive shots showed an airboat skimming the sawgrass at the 0:19 mark and a flamboyance of flamingos sharing frame with multiple basking alligators at 0:20 (GTA Wiki, 2025). Trailer 2 (May 2025) and the accompanying website update — which delivered seventy screenshots and dedicated location descriptions for six regions of Leonida, Grassrivers among them — confirmed the wetland as one of six major map zones alongside Vice City, the Leonida Keys, Ambrosia, Mount Kalaga National Park and Port Gellhorn (Harte, 2025; Wilson, 2025; Wikipedia, 2026b).
Visually, Rockstar's Grassrivers screenshots lean hard into the Mosquito Coast palette: tannin-stained water, dawn mist clinging to mangrove roots, stilted shacks, airboats, beat-up swamp-buggies, and characters who read as drifters, smugglers, evangelicals and survivalists rather than tourists. The settlement of Watson Bay anchors human habitation within the region (GTA Wiki, 2025), echoing the small jungle outpost of Jeronimo in Weir's film. Just as Allie Fox's utopian ice-machine project at Jeronimo is invaded by "three armed men" hiding in a remote hut (Wikipedia, 2026a), Grassrivers in GTA VI is positioned as a haven for drug-runners — Jason Duval is established as having "worked for local drugrunners in the Leonida Keys after serving in the Army," and his landlord Brian Heder is "a longtime drug runner in the Keys" whose operations plausibly extend into the wetland interior (Wikipedia, 2026b).
The Grassrivers presentation therefore fuses three lineages. First, the Everglades: River of Grass lineage of Marjory Stoneman Douglas — ecological reverence, the wetland-as-living-organism — supplies the region's name and the educational signage seen in the 2022 leaks (GTA Wiki, 2025). Second, the Mosquito Coast lineage of Theroux, Schrader and Weir supplies the noir register: paradise corrupted, missionaries versus madmen, the river as both highway and trap, and the ever-present hum of unseen violence (Wikipedia, 2026a). Third, Rockstar's own satirical lineage — Florida Man, militia compounds, mosquito-borne disease jokes seeded as far back as GTA IV — grounds the aesthetic in a recognisably 2020s American grotesque (Wikipedia, 2026b). The result, on the basis of currently available promotional material, is a wetland that promises to function tonally as Vice City's dark mirror: where the coast offers neon, influencer culture and bank heists, the Grassrivers offers gator-infested backwaters, swamp preachers, paranoid drifters and the slow rot of utopian dreams — Allie Fox's jungle, ported to Leonida.
GTA Wiki (2025) Grassrivers. Available at: https://gta.fandom.com/wiki/Grassrivers (Accessed: 14 May 2026).
Harte, C. (2025) 'Rockstar Shows Off Six Major Areas Of Vice City In Grand Theft Auto VI', Game Informer, 6 May. Available at: https://www.gameinformer.com/2025/05/06/rockstar-shows-off-six-major-areas-of-vice-city-in-grand-theft-auto-vi (Accessed: 14 May 2026).
Wikipedia (2026a) The Mosquito Coast (film). Available at: https://en.wikipedia.org/wiki/The_Mosquito_Coast_(film) (Accessed: 14 May 2026).
Wikipedia (2026b) Grand Theft Auto VI. Available at: https://en.wikipedia.org/wiki/Grand_Theft_Auto_VI (Accessed: 14 May 2026).
Wilson, I. (2025) 'Every GTA 6 location revealed so far', GamesRadar+, 6 May. Available at: https://www.gamesradar.com/games/grand-theft-auto/gta-6-locations/ (Accessed: 14 May 2026).