Core Concepts#

4671 Odyssey is the main roleplaying game of the setting: a legacy-driven RPG where characters, relics, factions, and consequences can survive long enough to matter in later eras. It is built for campaigns that do not simply end. They leave inheritances, scars, grudges, artifacts, and half-finished truths for the next generation to deal with.

One core d20 engine runs the whole line. The Lore Books then change the texture of play from era to era without forcing you to learn a new game every time.

At a Glance#

• One Core Engine, Seven Eras. Same d20 foundation across the whole timeline.
• Five Attributes: Vigor, Agility, Insight, Charm, Fortune.
• Core Check: d20 + Attribute + Skill + Proficiency + Item/Traits vs DC.
• Defense (DEF): 10 + Agility + Armor + Shield + Cover + Misc.
• Armor can add Soak and impose penalties.
• Action Economy: 1 Action + 1 Move + 1 Minor, plus Reactions.
• Legacy: items, outcomes, and scars persist through Legacy systems.
• Two ST Modes: traditional GM or Rotating Storyteller.

What the Game Rewards#

• time-spanning play without resetting the setting every campaign
• meaningful faction pressure where alliances are useful but never safe
• choices that matter later because the world remembers them
• players who like both drama and consequence, not just encounter churn