Birthdays the Beginning is a sandbox game developed by NIS America for Nintendo Switch. The game allows players to create cube-shaped worlds and experiment with the geography and temperature to give rise to diverse and unique lifeforms. The game's creator, Mr. Yasuhiro Wada, presents an opportunity to shape an entire ecosystem with careful experimentation and observation.

In Birthdays the Beginning, players can create any world they can imagine, from mountains and forests to deep seas with islands. The game features lifeforms of all shapes and sizes, including single-celled organisms, complex multicellular life, plants, mammals, and even dinosaurs. Players can shape their planet and decide how the plant and animal life evolves. With no two planets ever being truly alike, the game offers endless possibilities for players to cultivate their imagination.