4DTris is a four-dimensional tetris game for Windows and Linux. 4DTris is a free and open source software download from illusions.hu. 4DTris is licensed under GPLv3. In the 4D game space, every level is an NxNxN 3D space. To minimalize the number of controls, the levels are now only 2x2x2. In this way we can spare the move controls. So remain 4 controls for rotation around the four axis of 4 dimensions. Thank you your 4DTris development team