🛠️ IdleOn - The Idle RPGのアップデート履歴
開発元がSteamで公開した公式告知（パッチ、新コンテンツ、イベント）を時系列でまとめています。タイトルをクリックすると全文を読めます。
2026年9月
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9/19土📢 お知らせJELLY OPERATOR [new content]
The Jelly needs life-saving operation ASAP!Build your cellular army, earn Bloodcell currency, buy tons of upgrades, and get a unique reward for each and every successful operation!• New research game …
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9/6日📢 お知らせW7 Taskmaster
• World 7 Tasks are here! Unlock them via Wavey Wayne in the top-left corner of the W7 town!• Wayne has 4 Tasks to complete 10 times each, and 5 upgrades to buy in the W7 Merit Shop!• New Sushi Upgrad…
2026年8月
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8/30日🎉 イベントCROPFALL EVENT (Ends 9/14)
• Cropfall Event is LIVE - collect Baskets from defeating any monster, and open them for Event Cards, Nametags, gems, time candy, and hats!• Singed Cards - click the King Card in World 1 town (above t…
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8/26水✨ 新コンテンツNEW CLASS - Royal Guardian!
Kingdom Expansion - the main gameplay of the Royal Guardian!15 new talents for Royal Guardian - including the new ROYAL ARMORY, the LIL' ORBIES SHOP, and much more!Verminous Rats - a new miniboss foun…
2026年6月
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6/22月🎉 イベントFREE STUFF - Summer Event!
GET YOUR FREE TOKEN NOW!1. Defeat any monster, and you'll be credited with +1 Pet-Bonus Token. Getting multiple of these token doesn't do anything btw. 2. Find a player with the pet bonus you want mos…
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6/16火📢 お知らせCrystal Cove & Green Water - NEW CONTENT!
• Cavern 18 - The Crystal Glunko Cove!• Collect gooey shapes, from Triangles to Nonagons, in order to upgrade your Cove Stats -- you have a unique Drop Rate, AFK Gains, and Multikill value while in Ca…
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6/7日📢 お知らせCOOKING MASTERY - New Content!
THE MASTERY IS REAL?!?!!New Content• Cooking Mastery is HERE! Unlocked via Rift 61.• New Ribbons - Rank 21~25. Must be unlocked via Rift 61.• New Research Grid - \• New Vial - uses Chapter 6 spelunkin…
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6/2火📢 お知らせPerma Greenstacks, and Fortune Mill CROSSOVER pet!
• Greenstacking is now PERMANENT! When you greenstack an item by getting 10M+ of them in your Storage Chest, it stays greenstacked! There's also a SLAB DISPLAY so you know which items are perma-greens…
2026年5月
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5/30土📢 お知らせ11th Character slot!
IdleOn's 11th character slot is NOW OPEN! Go create your 11th character! NEW MAP - Dreadnaught Chamber (requires all 11 characters in the Pirate Mess Hall) FORTUNE MILL is a standalone idle game where…
2026年4月
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4/25土📢 お知らせTHE FOUNTAIN - New Caves!
• The SENTINEL CAVERNS have been discovered over at The Hole in World 5... with TWO brand new caverns now available!• Note: new caverns mean only 12 lanterns can be used daily. You'll see, use them wi…
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4/18土🎉 イベント5th ANNIVERSARY EVENT!
IdleOn is 5 years old! I've given you all 555 gems and 5 free event plays! Credited to your account as you're reading this, go spend them!• NEW EVENT! Collect boxes from monsters, open them for new ex…
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4/11土📢 お知らせNIGHTMARE CHALLENGES!
• 41 NEW Dream Challenges to complete at the Equinox Valley in World 3 - requires Research G8!• New Research upgrade: G8 -- MUST HAVE to unlock these new challenges!• New Equinox Upgrade 'Nonstop Stud…
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4/6月📢 お知らせTHE BUTTON!
• NEW MAP - Trench Precipice, found directly after the Kelpfish map at the end of World 7.• Defeat the new strongest mob in IdleOn, the MANTA RAY, with 25T crystal HP they won't go down easy. This of …
2026年3月
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3/30月📢 お知らせ[New Content] SUSHI STATION
It's SUSHI TIME!!! ːSmile_IdleOnː• The SUSHI STATION is in business! You can access it from the STACK OF PAPERS in world 7 town! \• Start by cooking Tier 1 sushi, and combine them to form Tier 2, then…
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3/18水🎉 イベントGoldrush Event & FREE PETS!
Goldrush Event is LIVE! Play the new Pots o' Gold game!• Earn +1 free play every day by collecting all 50 Edible Coins! • Earn 10+ free plays by keeping IdleOn up and running! • Earn +1 free play by o…
出典：Steam公式告知（6～24時間ごとに更新）。タイトルと概要の著作権は各開発元に帰属します。