We're building fan expansions, and we'll probably build some more before we're done. While we would love for everything to be perfectly compatible, that's a lot of effort, and possibly a fool's errand. With that in mind, here are the priorities we keep in mind when evaluating how severe a compatibility issue might be.

1. We endeavor to preserve behavior of all official cards and expansions, and between each other. We will fix bugs that arise due to discovered compatibility issues, unless they're just demonstrably too much work given our infrastructure. This includes the base game, Corporate Era, Venus, Colonies, Prelude, Prelude 2, Turmoil and the Promo cards.

2. There are many fan and community expansions, and these may grow. Our goal is to maintain compatibility between a single fan expansion and all the the components listed above, but with less urgency than above. That means fan expansion bugs may linger for some time. This includes (to date) Community cards, Ares, The Moon, Political Agendas, Pathfinders, and CEOs.

3. Compatibility issues may arise between fan expansions. We'll do our best to make sure things remain compatible between fan expansions, but will leave compatibility gaps, or even change behavior over time to accommodate key changes. That doesn't mean we'll ignore differences between these expansions, but it does mean that we will not endeavor to provide the perfect Every Expansion Experience.

4. Compatibility issues may arise when a player has more than one corporation. With the promo Merger and Double Down preludes, a player could now have three corporations at once. We have managed to address what seem to be the majority of two-corporation compatibility issues. Further resolution will likely get very low priority, and an issue with three corporations might have none at all.

No matter the issue, this still comes down to being a volunteer effort, a labor of love. Prioritization may be a matter of what feature someone wants to fix. Or what nuanced concern two people want to debate to their deep satisfaction. Words like "endeavor" and "best effort" don't have force behind them, they're just there to give you a sense of our principles when making a decision about getting certain things just right.