Soren Johnson returns to the show to discuss progression systems with Jon and Dirk, with a special focus on technology trees. What are the advantages and disadvantages of abstraction? How do Diablo 2 and 3 and Civilization 4 and 5 differ? What is At the Gates doing with Romanization Perks? And hell, what makes for a good progression system anyways? All of these questions - and more - are answered within!