Like the RPGs that the card game drew inspiration from, Buck: Legacy is a flexible game system that can accommodate house rules. House rules are promoted on page 2 of the rulebook and widely accepted, provided that all players are informed of the changes to the rules before playing.
This can also include custom cards, custom bosses and custom game mechanics.
Fan Rules
Fan Rules are house rules for gameplay mechanics created by fans, such as exploding dice, PvP and crits.
Fan Cards
Fan Cards are custom cards created to supplement Buck: Legacy, some have their own mechanics and Fan Rules.
Fan Fiction
Fan Fiction are OC stories, comics and characters created for the universe of Buck: Legacy, they are not considered canon.