An arcane action is one which is brittle, unnatural or requires an unfair leap of perception on the part of the player. Arcane actions are sometimes intentional as part of a design for expert players, but mostly a result of bad design or a lack of outside user testing.
The opposite of an arcane action is a natural action.
Related Topics
Action, Clarity, Expertise, Fairness, Natural Action, Opacity, Physicality, Weird Controls