"Mass Effect 2" is a science fiction action role-playing game developed by BioWare and released in 2010. It is the second installment in the Mass Effect series, continuing the story of Commander Shepard as they assemble a diverse team to combat a new threat known as the Collectors. Players make choices that affect the game's narrative and character relationships. The game features a blend of third-person shooting and role-playing elements, allowing players to customize their characters and abilities. Set in a richly detailed universe, "Mass Effect 2" emphasizes player decisions, which can lead to different outcomes and endings, enhancing replayability and engagement.