{"schemaVersion":1,"record":{"key":"mechanic/progression-rewards--t241","type":"mechanic","id":"progression-rewards--t241","lang":"en","title":"Collections, albums and set completion","summary":"Found objects fill a visible set. Gaps show what remains to discover and turn individual rewards into a long-term goal.","updatedAt":"2026-10-21","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/progression-rewards--t241/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/progression-rewards--t241.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/progression-rewards--t241.md","aliases":["Collections and set completion"],"tags":["Progression, rewards and retention","Mechanics and variants"],"sourceIds":["source-3817d420df0baa92","source-1696c3167e4356ed"],"sources":[{"id":"source-3817d420df0baa92","title":"Robert Nystrom: State","url":"https://github.com/munificent/game-programming-patterns/blob/master/book/state.markdown","verifiedAt":null},{"id":"source-1696c3167e4356ed","title":"Hollow Knight","url":"https://store.steampowered.com/app/367520/Hollow_Knight/","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"A collection turns separate findings into a visible set whose missing entries guide further searches."},{"id":"variants","title":"Variants","body":"### Mechanic variants\n\n<a id=\"t241-variants\"></a>\n\n- Silhouettes suggest the shape of a missing entry. <a id=\"t241-v1\"></a>\n- Categories connect items through a shared feature. <a id=\"t241-v2\"></a>\n- Trading turns duplicates into a path toward gaps. <a id=\"t241-v3\"></a>\n- Discovery history preserves location and circumstances. <a id=\"t241-v4\"></a>"},{"id":"example","title":"Design example","body":"A plant album's empty mountain category suggests exploring at a different altitude.\n\nPrototype check: Test the final collection entries: completion should have a clearer path than endless blind repetition."},{"id":"context","title":"Context and limits","body":"Progression changes player options and goals; rewards should explain new decisions and preserve useful stopping points. Each overview separates player actions, state changes and alternative rules. Examples are hypothetical design scenarios, not claims about a named game. A prototype check states an observable question for the next iteration. Existing detailed references remain separately linked from the direction map."}],"relations":[{"type":"uses","direction":"outgoing","label":"Sources in the selection","key":"resource/state-pattern","title":"State: Game Programming Patterns","url":"https://gamemechanics.pro/en/resources/#resource-state-pattern","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/resource/state-pattern.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/resource/state-pattern.md"}],"placements":[{"catalogId":"progression-rewards","id":"t241","title":"Progression, rewards and retention","url":"https://gamemechanics.pro/en/mechanics/progression-rewards/#t241","categoryIds":["mechanics"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-21","title":"Collections and set completion","description":"Found objects fill a visible set. Gaps show what remains to discover and turn individual rewards into a long-term goal.","image":{"src":"images/mechanics/hollow-knight-charms.webp","width":1440,"height":810,"crop":{"x":113,"y":143,"width":1237,"height":562},"game":"Hollow Knight","sourceUrl":"https://store.steampowered.com/app/367520/Hollow_Knight/","originalUrl":"https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/367520/ss_33a645903d6dd9beec39f272a3daf57174a6cc26.1920x1080.jpg?t=1776125684","credit":"Team Cherry","rights":"© Team Cherry. All rights reserved.","caption":"Found charms and empty spaces","alt":"Hollow Knight: a collection displays acquired charms and empty positions for missing finds.","markers":[{"x":33,"y":55,"label":"An acquired charm fills its collection slot"},{"x":49,"y":55,"label":"An empty position represents an undiscovered object"}]},"tips":["Make the set’s size and collection rules clear.","Suggest a search direction without necessarily revealing the reward."],"examples":[{"title":"Hollow Knight","url":"https://store.steampowered.com/app/367520/Hollow_Knight/"}]}},"endsAt":null,"provenance":"Original bilingual editorial overviews authored for gamemechanics.pro on 2026-10-20 and reviewed on 2026-10-21. Scenarios are hypothetical design examples; prototype checks describe work to perform, not completed playtests. Primary sources support the stated techniques and implementation context, not every proposed variant.","license":"CC-BY-4.0","codeLicense":"MIT","attribution":"gamemechanics.pro contributors","catalogKey":"catalog/progression-rewards"}}