{"schemaVersion":1,"record":{"key":"mechanic/rpg-grind--duplicate-fusion","type":"mechanic","id":"rpg-grind--duplicate-fusion","lang":"en","title":"Duplicate fusion","summary":"Matching copies are consumed to strengthen the result. In 2048, two 2 tiles merge into a 4; RPGs can apply this principle to duplicate items.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/rpg-grind--duplicate-fusion/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/rpg-grind--duplicate-fusion.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/rpg-grind--duplicate-fusion.md","aliases":[],"tags":["RPG grinding","Equipment upgrades"],"sourceIds":["source-19446e425a9a00b3","source-5b737ba9e639da22"],"sources":[{"id":"source-19446e425a9a00b3","title":"2048","url":"https://github.com/gabrielecirulli/2048","verifiedAt":null},{"id":"source-5b737ba9e639da22","title":"2048","url":"https://play2048.co/","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"Duplicate copies are consumed to strengthen a chosen item, making duplicates a progression resource."},{"id":"variants","title":"Variants","body":"### Action → reward\n\n<a id=\"duplicate-fusion-loop\"></a>\n\n- Obtain duplicate copies → consume them to develop the main item. <a id=\"duplicate-fusion-repeat\"></a>\n- Raise rank using copies from a defined group. <a id=\"duplicate-fusion-option-2\"></a>\n- Choose between fusion and keeping a copy for another build. <a id=\"duplicate-fusion-option-3\"></a>"},{"id":"example","title":"Design example","body":"A duplicate talisman is consumed to raise the main talisman’s rank and increase its charge."},{"id":"context","title":"Context and limits","body":"A systematic RPG grind reference: 110 mechanics and 330 variants in 18 sections. Four layers answer different questions: what the player repeats, what develops, how rewards arrive and what constrains the loop. It covers single-player RPGs, ARPGs, MMORPGs and adjacent management and accumulation systems. Every mechanic has an explanation, variants and a hypothetical example; coverage, combinations and verified game observations follow the catalog."}],"relations":[],"placements":[{"catalogId":"rpg-grind","id":"duplicate-fusion","title":"RPG grinding","url":"https://gamemechanics.pro/en/mechanics/rpg-grind/#duplicate-fusion","categoryIds":["equipment-upgrades"]}],"supersededBy":[],"attributes":{"preview":{"updatedAt":"2026-10-22","title":"Duplicate fusion","description":"Matching copies are consumed to strengthen the result. In 2048, two 2 tiles merge into a 4; RPGs can apply this principle to duplicate items.","image":{"src":"images/mechanics/systems-2048-original.webp","width":500,"height":694,"game":"2048","sourceUrl":"https://github.com/gabrielecirulli/2048","originalUrl":"https://github.com/gabrielecirulli/2048/blob/master/index.html","credit":"Gabriele Cirulli; screenshot of the unmodified original game, captured 2026-10-22","rights":"© 2014 Gabriele Cirulli, MIT License. Screenshot converted to WebP on 2026-10-22. License copy: images/mechanics/2048-license.txt.","caption":"The original 2048 after a sequence of normal moves","alt":"The original 2048 after a sequence of normal moves","markers":[{"x":86,"y":55,"label":"Adjacent twos can be merged into a four"}]},"tips":["Show the fusion recipe and result before consuming copies."],"examples":[{"title":"2048","url":"https://play2048.co/"},{"title":"Original source","url":"https://github.com/gabrielecirulli/2048"}]}},"endsAt":null,"provenance":"Original editorial RPG grind taxonomy authored for gamemechanics.pro on 2026-10-20 and expanded to cover activities, progression goals, reward rules and constraints. All original thirty family/branch/variant identities are preserved. Official developer and publisher sources support only the specifically described released-game observations; design variants and scenarios are hypothetical.","license":"CC-BY-4.0","codeLicense":"MIT","attribution":"gamemechanics.pro contributors","catalogKey":"catalog/rpg-grind"}}