: 8 additional bonus levels that prolong the adventure.
: Features 4 difficulty modes to suit different skill levels, ranging from relaxed to challenging. Roads_of_Rome_Portals_2_Collectors_Edition-RAZO...
: An automatic guide (strategy guide) for level completion and cache maps to help find all hidden secrets. Roads Of Rome: Portals 2 Collector's Edition on Steam : 8 additional bonus levels that prolong the adventure
: Access to downloadable desktop wallpapers , concept art, and official music tracks. and official music tracks.