{
  "slug": "collaboration-event",
  "url": "https://gachawiki.com/wiki/collaboration-event",
  "type": "term",
  "title": "Collaboration event",
  "description": "A limited crossover with an external franchise, typically with its own banner, separate pity pool, and characters that never return to the regular pool, such as Star Rail's Fate/stay night collab.",
  "aliases": [
    "collab",
    "crossover event"
  ],
  "tags": [
    "terminology",
    "mechanics"
  ],
  "verification": "partial",
  "lastUpdated": "2026-07-09",
  "lastVerified": "2026-07-09",
  "sources": [
    {
      "title": "Honkai: Star Rail Fate/stay night collaboration warp details (Version 3.4)",
      "url": "https://game8.co/games/Honkai-Star-Rail/archives/462460",
      "publisher": "Game8",
      "accessed": "2026-07-09",
      "note": "Secondary source documenting the separate collaboration pity pool."
    }
  ],
  "related": [
    "banner",
    "rerun",
    "pity-system",
    "honkai-star-rail",
    "wuthering-waves"
  ],
  "markdown": "A collaboration event (collab) is a limited crossover in which characters or items from an external franchise appear in a gacha game. Collabs are marketing spikes for both sides, and mechanically they tend to come with special rules that this wiki tracks because they trip up cost planning.\n\nThe recurring pattern: collab characters run on a separate [banner](/wiki/banner) category whose [pity](/wiki/pity-system) pool is isolated from regular banners. Progress built on a collab banner does not transfer out when the event ends, and vice versa. Honkai: Star Rail's Fate/stay night collaboration (from Version 3.4, July 2025) works this way, [[1]](#ref-1) and Wuthering Waves' Cyberpunk: Edgerunners collab (June 2026) even used a dedicated pull currency.\n\nThe second recurring rule is permanence: collab characters usually never enter the standard pool and rerun rarely or never, since reruns require re-licensing the IP. Communities treat collabs as now-or-never pulls for that reason, and older games carry folklore about missed collab units that never returned.\n\nHistorically, license-heavy games built entire calendars on collabs; the model runs from early Japanese social games through modern examples across the genre. For players the practical checklist is stable: confirm whether the pity pool is shared, whether the currency is separate, and whether any unit is given free during the event.",
  "license": {
    "name": "CC BY-SA 4.0",
    "url": "https://creativecommons.org/licenses/by-sa/4.0/"
  }
}