Sources
Sources used to build the Perk Chart include:
- E3 Gameplay Presentation
- Leaked Gamescom Video
- Perk chart thread by gkk7z on Bethesda official forums: http://forums.bethsoft.com/topic/1530622-completed-perk-chart-speculation
- Perk chart featured on vault111.com
- Reddit thread: https://www.reddit.com/r/fo4/comments/3gn9gl/fallout_4_perk_chart_best_effort/