{
  "slug": "arknights",
  "url": "https://gachawiki.com/wiki/arknights",
  "type": "game",
  "title": "Arknights",
  "description": "Tower-defense RPG by Hypergryph, released in China in 2019 and globally in January 2020. Uses an escalating-rate pity (2% base, rising 2% per pull after 50 without a 6-star) and added a 300-pull spark to limited banners in 2024.",
  "aliases": [
    "AK",
    "Mingri Fangzhou"
  ],
  "tags": [
    "games"
  ],
  "verification": "verified",
  "lastUpdated": "2026-07-09",
  "lastVerified": "2026-07-09",
  "sources": [
    {
      "title": "Arknights (release history)",
      "url": "https://en.wikipedia.org/wiki/Arknights",
      "publisher": "Wikipedia",
      "accessed": "2026-07-09",
      "note": "Tertiary source for release dates and publishers."
    },
    {
      "title": "Headhunting rates and escalation rules (community documentation of in-game disclosure)",
      "url": "https://arknights.wiki.gg/wiki/Headhunting",
      "publisher": "Arknights community wiki",
      "accessed": "2026-07-09",
      "note": "Mirrors the probability rules published in the in-game headhunting Details screen."
    },
    {
      "title": "Headhunting Data Contract (spark) rules",
      "url": "https://arknights.wiki.gg/wiki/Headhunting_Data_Contract",
      "publisher": "Arknights community wiki",
      "accessed": "2026-07-09",
      "note": null
    }
  ],
  "related": [
    "pity-system",
    "spark",
    "banner",
    "rate-up",
    "powercreep",
    "arknights-endfield"
  ],
  "game": {
    "developer": "Hypergryph",
    "publisher": "Hypergryph (CN); Yostar (global, JP, KR)",
    "firstRelease": "2019-05-01 (China)",
    "globalRelease": "2020-01-16",
    "platforms": [
      "iOS",
      "Android"
    ],
    "status": "active",
    "officialSite": "https://www.arknights.global",
    "genre": "Tower-defense RPG",
    "infobox": [
      {
        "label": "Premium currency",
        "value": "Orundum (600 per headhunt)",
        "cite": 2
      },
      {
        "label": "Base 6-star rate",
        "value": "2%",
        "cite": 2
      },
      {
        "label": "Rate escalation",
        "value": "+2% per pull after 50 pulls without a 6-star",
        "cite": 2
      },
      {
        "label": "Spark (limited banners)",
        "value": "300 pulls, since 2024",
        "cite": 3
      }
    ]
  },
  "markdown": "Arknights is a free-to-play tower-defense RPG developed by Hypergryph in Shanghai. It launched in China on May 1, 2019, and worldwide on January 16, 2020, with Yostar publishing the global, Japanese, and Korean servers. [[1]](#ref-1) It is mobile-only and is known for a gacha design that predates the HoYoverse pattern and works differently from it.\n\n## Pull system\n\n*Main article: [Headhunting](/arknights/wiki/headhunting)*\n\nPulls are called headhunting, and operators are the playable units. The published rules: [[2]](#ref-2)\n\n| Parameter | Value |\n| --- | --- |\n| Base 6-star rate | 2% per pull |\n| Escalation | if 50 pulls pass without a 6-star, the rate rises by 2% per pull (4% at pull 51, 6% at 52, and so on, reaching 100% by pull 99) |\n| 5-star floor | a 5-star or better is guaranteed within the first 10 pulls on each banner |\n| Cost per pull | 600 Orundum (or 1 Headhunting Permit) |\n\nThis escalating-rate design is the main alternative to the fixed hard pity used by HoYoverse games: instead of a cliff at pull 90, the odds climb quickly after a dry streak, which caps bad luck at 99 pulls in the worst case and produces an average close to 34.6 pulls per 6-star (a widely cited community computation from the official rules). The escalation counter carries over between successive standard banners but is tracked separately on limited and collaboration banners. [[2]](#ref-2)\n\nThe featured guarantee is weaker than in most peers: on standard banners each 6-star has a 50% chance of being one of the two rate-up operators, with no loss protection. Limited banners guarantee a rate-up limited operator on the first 6-star after 150 pulls (once per banner), and collaboration banners guarantee the featured 6-star within 120 pulls. [[2]](#ref-2)\n\n## Spark system\n\n*Main article: [Headhunting Data Contracts](/arknights/wiki/headhunting-data-contracts)*\n\nStarting with the \"Cremation Last Wish\" limited banner in 2024, limited banners grant one Headhunting Data Contract per pull. 300 contracts can be exchanged for the banner's rate-up limited 6-star (75 for a rate-up 5-star). Contracts expire when the banner ends and convert into a small amount of shop currency, so the [spark](/wiki/spark) does not carry between banners. [[3]](#ref-3) In 2025 the exchange cost for much older shop operators was reduced from 300 to 200 contracts. [[3]](#ref-3)\n\n## Service status\n\n*Main article: [Release history](/arknights/wiki/release-history)*\n\nThe game is in active service as of July 2026; its global sixth-anniversary event ran in January and February 2026 with a limited banner using the 300-contract spark. [[2]](#ref-2) Its console-and-PC successor project, [Arknights: Endfield](/wiki/arknights-endfield), launched in January 2026 as a separate game while the original continues.",
  "license": {
    "name": "CC BY-SA 4.0",
    "url": "https://creativecommons.org/licenses/by-sa/4.0/"
  }
}