Giant Door

Giant Door was an independent video game developer and self-publisher founded in 2019 in Cologne, Germany. Its work focused on physics-based puzzle-platforming and cooperative play, combining game design, prototyping, programming and 3D art within a small production team.

The studio originated from a collaboration between Cologne Game Lab graduates and developers. Its debut project began as a Ludum Dare game jam prototype exploring an unusual cooperative idea: characters holding hands and working together. That experiment became the foundation for Derpy Conga, the studio’s commercially released game.

Cooperative play through physics

Derpy Conga asks players to connect whimsical creatures into a growing conga line and guide them through environmental puzzles. As more characters join the chain, movement becomes harder to control, making the line itself central to both traversal and puzzle-solving. The design combines physics-based movement with local cooperative multiplayer mechanics.

Giant Door developed the game using Unity and released it on February 10, 2022, for PC through Steam and for Nintendo Switch. The studio handled both development and publishing, with capabilities spanning concept design, prototyping, production and multiplatform release. Its production work included custom C# scripting, 3D character modeling and environment art.

Alongside its debut, Giant Door explored Design Slices, a separate project that received concept funding. The supplied company history identifies it as a prototype or concept rather than a released commercial title. Following the launch of Derpy Conga, the studio did not proceed to commercial production on subsequent games. Its published catalog remained available digitally through Steam and the Nintendo eShop.