Raid: Shadow Legends is a fantasy-themed, turn-based role-playing gacha game. The game's story takes place in the fictional realm of Teleria, which has been subjugated by the Dark Lord Siroth. Players take the role of an ancient Telerian warrior resurrected to defeat the Dark Lord and restore peace and harmony to the territory. Players must assemble an army for battles in settings such as castles, dungeons, deserts and temples defended by enemies and possible allies. Throughout the game, players accumulate Shards, vessels containing the souls of past warriors. Shards come in four types with different properties. Another currency in the game is Silver, which the player uses to do almost anything in the game, from leveling up champions, to playing a stage.
The game consists primarily of story-driven single-player campaign with twelve levels, each level made up of seven stages with three levels of difficulty. The single-player campaign is interconnected with a multiplayer component to decide player rankings.
The game's narrative was written by Paul C.R. Monk, and the game adopts a Western art style, with realistic characters, and settings inspired by dark fantasy.