Japanese programmer turns Wikipedia into a free gacha game; after launch it once reached more than 100 packs per second and has now surpassed 100 million packs in total
Japanese independent developer Harusugi (X/Twitter @harusugi5) launched the browser game Wikigacha (also known as Wikipedia Gacha) on February 24/25, 2026. You can open the webpage and draw cards directly, with no registration or login required; progress is stored locally in the browser. Each pack contains 5 cards, and each card corresponds to a Wikipedia entry (supporting versions such as Japanese, English, and Chinese).
Rarities are divided into 7 tiers according to WikiRank's quality score (Q-Score): C, UC, R, SR, SSR, UR, and LR. Attack power (ATK) = article pageviews × rarity multiplier, and defense power (DEF) = article length × rarity multiplier. Every 10 packs guarantee at least one SR or above (gold pack), and every 100 packs have a higher-level guaranteed drop. Clicking a card can jump to the original Wikipedia page. The game also supports single-card battles, five-card team formations, and a daily Raid Boss.
Traffic and business model: after launch, it quickly became popular in Japan and spread outward; the developer reported a peak of more than 100 packs opened per second (around ten days after launch, with coverage followed by media outlets such as Forbes). By early April 2026, Harusugi himself posted that the cumulative total had reached 100 million packs and launched related activities. The game is completely free, and card packs cannot be purchased directly with money; extra packs are obtained through daily tasks (such as opening 5 packs, drawing an SR+, sharing, watching ads, etc.). The card pool contains more than 6.74 million cards.
Sources and verification:
English Wikipedia entry Wikigacha (developer, mechanics, launch date)
Forbes (Leslie Katz, March 7, 2026): confirms the developer’s identity, the peak of 100 packs per second, and that packs are obtained for free through ads/tasks
Automaton West, GIGAZINE: detailed gameplay, rarity, and numerical calculations
Harusugi's own X/Twitter posts (around April 4, 2026): activity post marking the achievement of a cumulative total of 100 million packs
Destructoid and others: explicitly state that packs cannot be bought with money
ABAB AI Insight
This is a lightweight experiment that turns Wikipedia's random-entry mechanism into a gacha. Quality, popularity, and length are directly mapped into numbers and rarity, preserving the diversity of the encyclopedia while using the immediate feedback of gacha. The model of free access + time gating + ad-based extra packs could still support high concurrency at peak times, showing that the core appeal comes from the uncertainty of what the next card will be, rather than from payment depth. For Wikimedia, this is an unofficial derivative, and no official response has been seen so far.
Perception note: gacha addiction and the self-justification of “I am learning” can easily coexist; opening packs for a long time does not mean effectively reading the original articles. The game itself is a lightweight browser work, and its server load and data-usage boundaries are worth attention.