Player-experience effects
Each entry carries two to six tags describing what the mechanic tends to produce in its canonical form. Tags are descriptive, not evaluative: negative and structural effects are recorded where they apply.
Cognitive
Effects on thinking, learning, and problem-solving.
Mastery
Perceived growth of player skill through repeated use of the mechanic.
Discovery
Pleasure of uncovering previously unknown content, rules, or state.
Planning
Satisfaction from constructing multi-step plans and seeing them resolve.
Inference
Reasoning from partial evidence to a conclusion about hidden state.
Engine satisfaction
Gratification from a built system producing escalating output.
Analysis paralysis
Decision slowdown caused by many comparable options with calculable consequences.
Spatial reasoning
Reasoning about position, adjacency, paths, and lines on a represented space.
Execution
Outcome depends on the player’s timing or physical precision rather than on which option is chosen.
Calculation
Outcome rewards exact enumeration of moves, counts, or odds within a bounded, fully specified space.
Recall
Outcome depends on retaining and retrieving state or sequences seen earlier in play.
Emotional
Affective states the mechanic tends to produce.
Tension
An outcome that matters is held unresolved over a span of play the mechanic itself creates, while the player keeps acting or must wait.
Flow
Absorbed, continuous engagement produced by well-matched challenge and feedback.
Ownership
Sense that an artefact (character, deck, map, story) is distinctively the player’s own.
Consequence weight
Heightened awareness that decisions are irreversible or costly.
Frustration risk
Propensity to produce feelings of unfairness or helplessness, typically from low-agency loss.
Sunk cost
Reluctance to abandon invested positions even when suboptimal.
Fear of missing out
Anxiety over opportunities others may take or windows that are closing.
Spectacle
Rare, amplified, or staged outcomes produce memorable peaks distinct from sustained uncertainty.
Compulsion
Habit-forming pull to return or repeat, produced by scheduled rewards or escalating counters rather than by decision quality.
Social
Effects on how players relate to one another.
Bluffing
Incentive to misrepresent one’s state or intentions.
Negotiation
Incentive to bargain, promise, or form deals with other players.
Social deduction
Reading other players’ behaviour to infer hidden roles or intent.
Kingmaking
A player who cannot win can decide which other player does.
Teamwork
Coordination and shared problem-solving among players with a common goal.
Alpha player
One player directs the decisions of others in a shared-goal structure, reducing their effective agency.
Betrayal
Incentive or opportunity to break an alliance or shared goal for individual gain.
Contested fairness
Players are prone to dispute an outcome’s legitimacy because a human judgement or a deliberate asymmetry intervened in it.
Structural
Dynamics of the play session that follow from the mechanic, neither good nor bad in themselves.
Runaway leader
A leading position becomes self-reinforcing and hard to overturn.
Catch-up
Trailing players gain compensatory advantage.
Emergent narrative
Memorable stories arise from system interaction rather than authored content.
Replayability
Variation across plays that sustains interest.
Downtime
Periods where a player waits while others act.
Grind
Repetition required to make progress, with low per-repetition novelty.
Volatility
Outcomes swing substantially on single events.