Passive abilities
Always-on effects that require no activation — a permanent stat boost, an automatic proc chance, an inherent resistance — layered onto a character or item without consuming actions or resources. Path of Exile's passive skill tree and Diablo III's item-granted passives both let players build significant character identity purely through always-active bonuses, distinct from the active-ability rotation. Designers use passives to add depth and build customization without increasing action-economy complexity (a passive doesn't compete for a hotbar slot or cast time), to reward planning and theorycrafting, and to create foundational build identity that active abilities then play around. Key decisions: whether passives are visible and player-chosen (a tree) or hidden and item-granted (surprise synergies), stacking and interaction rules between multiple passives, whether passives can be as build-defining as actives (a risk of overshadowing the active-ability layer), and clarity of what a passive actually does in practice. Pitfall: passives that are purely incremental (+2% to a stat) feel like filler — the most engaging passives change how a build plays, not just its numbers.
- Dev effort: Small
- Timing: Real-time or turn-based
- Common in: arpg, rpg