From the Organized Play Guide ...
Because the Pathfinder Society Organized Play campaign has evolved over its lifetime, some small adjustments need to be made when running scenarios from Seasons 0–4 under the current rules. Below are instructions for converting Scenarios #0–1 to #4–26.
Season 0 (Scenarios #1–#28): Season 0 scenarios were written under the 3.5 rules set of the world’s oldest role-playing game, before the release of the Pathfinder Role-playing Game. Scenarios are to be run with minimal changes by GMs, limited to adding CMB/CMD scores to NPCs and monsters and using newly combined skills such as Stealth and Perception instead of Move Silently and Spot. If a creature in the scenario also appears in the Pathfinder RPG Bestiary, Pathfinder RPG Bestiary 2, or Pathfinder RPG Bestiary 3 and maintains the same CR between both rules sets, you may use the Pathfinder RPG stats in place of the 3.5 stats. This is the only substitution allowed in these scenarios.
Prestige awards and faction missions: Faction missions no longer count towards the success conditions of a scenario, but they may be used to add extra flavor to the game session. Instead, earning Prestige is tied to fulfilling the primary and secondary success conditions of each mission. The primary and secondary success conditions grant 1 Prestige Point each, for a maximum total of 2 Prestige Points. The primary success condition for a Season 0–2 scenario is the overall scenario’s goal; Season 3–4 scenarios instead use the Success Condition included after the scenario’s Conclusion section.
A free, supplementary document available for download at paizo.com details the secondary success condition for each scenario. GM Note - these conditions are meant to be secret to the players - do not download it!
Seasons 0–2: For the first three seasons of the campaign, only five factions were available for characters to ally with. As such, members of the newer factions introduced in Season 3 playing older scenarios may utilize faction missions from another faction, as follows.
- Grand Lodge faction PCs should treat Osirion faction missions as their own for all Season 0, 1, and 2 scenarios.
- Sczarni faction PCs should treat Taldor faction missions as their own for all Season 0, 1, and 2 scenarios.
- Silver Crusade faction PCs should treat Andoran faction missions as their own for all Season 0, 1, and 2 scenarios.
Seasons 3–4: Two factions that are now retired - the Lantern Lodge and Shadow Lodge - were available for characters to ally with during Seasons 3–4; ignore these factions’ missions.
Slow advancement track rewards: The slow advancement track option was introduced in Season 3. The maximum amount of gold a slow advancement track PC can earn from pre-season 3 scenarios is half the listed amount (or Out-of-Subtier amount, see below) rounded down. Similarly, a Pathfinder using the slow advancement track may only earn a maximum of 1 Prestige Point for completing both mission objectives: 1/2 for completing the primary mission objective and 1/2 for completing the secondary mission objective. The pre-entered +1 XP on Chronicle sheets from
Season 0–2 scenarios should be changed to +1/2 for PCs using the slow advancement track.
Out-of-Subtier gold: The Out-of-Subtier value was introduced in Season 5; therefore, Chronicle sheets from Seasons 0–4 do not include these wealth tables for normal or slow progression. The Out-of-Subtier gold value is the average of the high and low subtiers; for slow progression it is half the normal Out-of-Subtier value, rounded down.