Grassrivers is Rockstar's Everglades: a subtropical wetland of swamps, marshes, cypress forests and slow-moving rivers. In Rockstar's words it's "the untamable jewel of Leonida's crown" — the gators may be the most famous attraction, but there are deadlier predators and weirder discoveries among the mangroves. Expect airboats, hunting, fishing and the most unusual biome in any GTA to date — Leonida's answer to Red Dead Redemption 2's bayou.