Gravity Bone

Gravity Bone is a freeware first-person adventure game that uses a modified version of the Quake 2 engine. The game received critical acclaim for its cohesive story, atmospheric gameplay, and ability to engage players in a short period of time. Its unique blend of spy-oriented gameplay and film-inspired music by Xavier Cugat has drawn comparisons to games like Team Fortress 2 and Portal. Despite its one-year development cycle, Gravity Bone successfully manages to immerse players in a captivating world.