Activision published an enhanced version of Asteroids for the PlayStation (1998), Microsoft Windows (1998), Game Boy Color (1999), and Classic Mac OS (2000) developed by Syrox Developments. This version radically altered the graphics, replacing the vector-based visuals with 3D rendered models. Five new zones were added with 15 levels each. In addition, new obstacles were added including regenerating crystal asteroids, indestructible asteroids, mild black holes that pull the ship inward, and stars that occasionally emit bursts of hazardous gas. The player chooses between one of three ships and can collect a number of new powerups.