{"rewrite":{"id":"r_6ab482083a96e0ffa70f4ed3","clusterId":"c_b1586d5183bf59a60161d330","slug":"core-keeper-free-weekend-runs-on-steam-from-october-9-to-13","model":"deepseek-v4-1-flash","headline":"Core Keeper Free Weekend Runs on Steam from October 9 to 13","summary":"Pugstorm and Fireshine Games will hold a Steam Free Weekend for the mining sandbox game Core Keeper from October 9 at 2 a.m. Japan time to October 13 at 2 a.m. Japan time. The full game, including all content added since release, will be playable at no cost during the period. That includes the latest major update, Riders of the Underground, which added animal riding, the Hookshot item, and a new Moss biome. Save data from the free period carries over to the full Steam version if a player buys it during or after the event. Core Keeper supports solo play and online co-op for up to eight players with drop-in and drop-out. The game is set in ancient caves where players mine resources, build bases, craft equipment, and fight bosses while exploring deeper. Its Steam store page price is 2,300 yen, and the full release launched on August 27, 2024 after Early Access began on March 8, 2022.","whyItMatters":"The free weekend arrives weeks after the Riders of the Underground update, so the event doubles as a sampling window for the newest content rather than the base game alone.","webCardHtml":"\u003cp\u003eCore Keeper has drawn more than 50,000 Steam reviews and holds a Very Positive rating there, and the press release puts its player count at 6 million. The Free Weekend opens the entire full release, not a demo slice, so the updates released after launch are included in the free period.\u003c/p\u003e\u003cp\u003eRiders of the Underground landed on September 21 with the Saddle for riding livestock animals, the Hookshot for crossing rifts and holes, and the Moss biome, alongside three new pets and new equipment. Pugstorm chief executive and game director Fredrik Prantare discussed the update at Tokyo Game Show 2026. Fireshine Games marketing lead Tina Moore also spoke at the event. The developer and publisher are based outside Japan, and Fireshine Games is part of the EG7 Group.\u003c/p\u003e","blueskyPost":"Core Keeper's free weekend includes the Riders of the Underground update, so newcomers sample animal riding, the Hookshot, and the Moss biome rather than a stripped demo.","twitterPost":"Core Keeper's free weekend hands out the full game plus Riders of the Underground, not a trimmed demo. Save data carries to the paid Steam version.","threadsPost":"Core Keeper's free weekend is the whole game, Riders of the Underground included. Animal riding, the Hookshot, and the Moss biome are all playable at no cost, and save data carries over to the paid Steam version, so the trial feeds directly into a purchase instead of resetting progress.","newsletterBlurb":"Pugstorm and Fireshine Games are running a Steam Free Weekend for Core Keeper from October 9 to 13. The full game is playable at no cost, including the Riders of the Underground update, and progress carries over to the paid version.","attributionJson":"[{\"source\":\"Denfaminicogamer\",\"url\":\"https://news.denfaminicogamer.jp/news/261008g\",\"title\":\"[Free] Popular sandbox game 'Core Keeper,' which supports up to 8-player multiplayer, is now available to play for free for a limited time on Steam. Starts October 9 at 2 a.m.\"},{\"source\":\"Game Spark\",\"url\":\"http://www.gamespark.jp/article/2026/10/08/173325.html\",\"title\":\"[Free Weekend] Up to 8-player mining sandbox ADV 'Core Keeper' free weekend to run from October 9 at 2:00 AM! Spend the three-day weekend underground with friends\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":8138,"outputTokens":952,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1791425239,"createdAt":"2026-10-08T02:04:13.000Z","publishedAt":"2026-10-08T02:06:08.000Z","updatedAt":"2026-10-08T02:06:08.000Z"},"cluster":{"id":"c_b1586d5183bf59a60161d330","canonicalTitle":"【無料】「最大8人マルチ」の人気サンドボックスゲーム『Core Keeper』がSteamにて期間限定で無料プレイ可能に。10月9日午前2時より開始","representativeArticleId":"a_aa088590beb487697d8412b4","sourceCount":3,"writtenSourceCount":2,"writeAttempts":0,"isSolo":false,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"Core Keeper\"],\"studios\":[],\"people\":[],\"type\":\"news\",\"domain\":\"games\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-08T00:48:36.000Z","lastSeenAt":"2026-10-08T02:49:15.000Z","updatedAt":"2026-10-08T02:54:32.000Z"},"attribution":[{"source":"4Gamer.net","url":"https://www.4gamer.net/games/621/G062117/20261008009/","title":"「Core Keeper」，Steamで全編無料のフリーウィークエンドを10月9日から開催。最新アップデート「地下のライダー」も遊べる"},{"source":"Denfaminicogamer","url":"https://news.denfaminicogamer.jp/news/261008g","title":"【無料】「最大8人マルチ」の人気サンドボックスゲーム『Core Keeper』がSteamにて期間限定で無料プレイ可能に。10月9日午前2時より開始"},{"source":"Game Spark","url":"http://www.gamespark.jp/article/2026/10/08/173325.html","title":"【週末無料】最大8人採掘サンドボックスADV『Core Keeper』フリーウィークエンド10月9日午前2時から実施へ！3連休は友達と地下に潜ろう"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["Core Keeper"],"studios":[],"people":[],"type":"news","domain":"games","is_roundup":false},"keyFacts":["The Core Keeper Steam Free Weekend runs from October 9 at 2 a.m. Japan time to October 13 at 2 a.m. Japan time.","Core Keeper supports one to eight players, with online co-op and drop-in and drop-out.","Save data played during the Core Keeper Free Weekend carries over to the full Steam version on purchase.","Core Keeper holds more than 50,000 Steam reviews and a Very Positive rating there, according to its store page.","Core Keeper's Steam price is 2,300 yen, and its full release launched on August 27, 2024."]}