Each symbol at the top represents a number. First one one the top right is the corner of the number 1. Accordingly the rest are numbers: 1,6,4,3. Touch them in that order and the door will open.
Tactical, beautiful, and wholly unique, the GOTY-winning sci-fi RTS returns with Homeworld 3. Assume control and battle through fleet combat in dazzling, fully 3D space while the award-winning story unfolds on a galactic scale.