Atrium is a work-in-progress science fiction game with physics based puzzles. It will provide high level of interactivity, featuring fully dynamic world with everything being controlled by the physics engine. You will be able to walk on any surface and push any object, use special devices to affect gravity and other physical behaviours of the environment. The gameplay will be peaceful and non-violent: explore the world, solve the puzzles and unleash the mysteries! The game uses custom graphics engine based on OpenGL and SDL. Physics engine is also written from scratch. Atrium is free and open source.