Mim is a story-driven adventure game about a sentient Mimosa seed exploring an extensive underground habitat while avoiding invasive root systems in search of its parent tree.

The player guides a young seedling through a dark, mystical world far below ground by the magical glow of her First Leaves. Though the creeping darkness threatens to snuff out all light, a sliver of hope perpetually drives the player onwards through the lonesome shadows - a distant memory of when their world was brighter.