Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan. Halo Twenty Four: Year Zero (2007). Artwork by Matthew Santoro, Rob Sheridan, and 42 Entertainment. Art direction and world building by Trent Reznor and Rob Sheridan.