Fugl

Fugl is an alpha-stage sandbox game that lets you play as a shape-shifting bird in a beautiful, open world. With no set rules, you can explore the picturesque landscapes, glide on breezes, or soar up cliffs at your own pace. The game currently requires a 64 bit system, OpenGL 4.3 or Metal 1.1, and a modern computer with 2 GB of GPU memory.