AdaVenture
kid-friendly retro point & click 3D OpenGL "adventure" game
... the castle of Xerxes. But, there will be obstacles to overcome. You must find the keys to various realms, defend yourself against dragons, avoid snakes and pesky bats who steal things only to drop them in random locations, and survive the maze.
Now with the music of Korla Pandit. The proper command to extract the archive and maintain the directory structure is "7z x filename".