Set bonuses
Equipping multiple pieces of a matching gear set grants escalating bonuses, rewarding players for completing collections rather than mixing best-in-slot items. Diablo III's set items and Destiny 2's armor sets make chasing and completing a set a build-defining goal, with 2-piece, 4-piece, and 6-piece thresholds that often transform a character's playstyle. Designers use set bonuses to create long-term collection goals, to define and telegraph build archetypes (a set is a ready-made build identity), and to give loot a coherent aspirational target beyond individual stat upgrades. Key decisions: threshold structure and how transformative the top bonus is, whether sets are so strong they crowd out non-set builds (a chronic Diablo balance problem), how sets are acquired (drops, crafting, vendors), and mixing rules (partial-set flexibility versus all-or-nothing). Pitfall: powerful set bonuses can homogenize the endgame — if the best builds are all 'wear the full set', the vast affix and item system underneath becomes irrelevant, so sets must compete with, not obsolete, freeform gearing.
- Dev effort: Small
- Timing: Real-time or turn-based
- Common in: arpg, looter-shooter