Honkai Impact 3rd (Chinese: 崩坏3; pinyin: Bēng Huài 3; lit. 'Honkai 3rd') is a free-to-play 3D action role-playing game (originally a mobile exclusive) developed and published by miHoYo, and later ported to Microsoft Windows. It is the spiritual successor to Houkai Gakuen 2, using many characters from the previous title in a separate story. The game is notable for incorporating a variety of genres, from hack and slash and social simulation, to elements of bullet hell, platforming, shoot 'em up and dungeon crawling across multiple single and multiplayer modes. It features gacha mechanics.

In addition to the game, the storyline of Honkai Impact 3rd spans multiple supplementary media including an anime series, multiple manhua series, and promotional videos.