
Screenshots

Watch trailer on Steam ↗ISOLAND4: The Anchor of Memory
Cotton Game · Published by Cotton Game · Official site ↗
Very Positive — 88% positive (168 reviews) · 21 achievements
Last updated 28 Sept 2026
ISOLAND4 is the fifth installment in the ISOLAND series by CottonGame. The game continues to feature the distinctive hand-drawn style of CottonGame, with point-and-click gameplay. The game also features a second playthrough mode, which allows players to gain a deeper understanding of the game.
£2.49
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Adventure, Indie, Strategy, Casual · 2024 · More under £5 games
Embark on a unique adventure through ISOLAND4, where strategic thinking meets casual exploration. Developed by Cotton Game, this indie game offers both standard playthroughs and an enhanced second mode to uncover hidden depths.
About this game
You'll only know after you've played it yourself. Wait a moment... even after playing, you might not necessarily know. :)
Since the first ISOLAND, this journey has been full of twists and turns, both in the game and in real life.
ISOLAND4 continues to pay homage to literature, art, and music like its predecessors, with more intricate maps and puzzles. However, the foundation lies in richer Easter eggs, more mystical dialogues, and more abundant emotions.
This installment emphasizes the characters in the story, featuring both familiar and new faces. They assist you in rediscovering the island's secrets while unraveling their own life mysteries.
Do not overlook any detail; do not miss any conversation.
Things that seem useless may offer players more contemplation on the fate of life.
This ISOLAND is dedicated to my mother.

System Requirements
Will my PC run this? →Minimum
- OS: Windows 10 (64bit)
- Processor: Intel Core 2 Duo E5200
- Memory: 4 GB RAM
- Graphics: GeForce 9800GTX+ (1GB)
- DirectX: Version 10
- Storage: 1 GB available space
- Additional Notes: 1080p, 16:9 recommended
Recommended
- OS: Windows 10 (64bit)
- Processor: Intel Core i5
- Memory: 8 GB RAM
- Graphics: GeForce GTX 560
- DirectX: Version 11
- Storage: 1 GB available space
- Additional Notes: 1080p, 16:9 recommended
Supported Languages
Latest news
AnnouncementsOfficial
Our Heartwarming New Title《Reviver》launches on January 9th!
Greetings, everyone! Mark your calendars! Reviver, our latest creation, launches on Steam January 9th! Prepare to be swept away by a narrative puzzle game weaving together romance, time travel, and destiny.ːDaisySHOCKː https://store.steampowered.com/app/2239130 Reviver represents a departure for CottonGame, delving deeper into storytelling and offering richer, more extensive text than our previous titles. Experience a poignant love story that spans a lifetime, from youthful exuberance to the golden years.ːDaisyGJː {STEAM_CLAN_IMAGE}/44840735/db25d6651fd574b60f5501f48c11ee1ebd0f648f.jpg {STEAM_CLAN_IMAGE}/44840735/2f05e8c683fa9dfbddb7cd2729e94e86d27c3ec6.jpg True to its name, Reviver embraces the butterfly effect as its core mechanic. Your choices, made across different eras, ripple through time, dramatically altering the narrative's course. Avert disastrous outcomes with seemingly small decisions, rewriting fate itself!ːtobdogː {STEAM_CLAN_IMAGE}/44840735/dbd843e213fee95b6db599b520b3780a2b66a57a.png ːsteammockingːNaturally, we've retained the signature CottonGame brain-teasing puzzles you've come to expect. To complement this, we've sprinkled in a variety of engaging minigames, offering delightful diversions throughout your journey. Intrigued? Wishlist Reviver now to be notified the moment it releases!ːSpeech_Loveː {STEAM_CLAN_IMAGE}/44840735/c91cbeaecc20dc24d9b40b2b26cde418be6edb24.png Stay tuned – more exciting news is on the horizon! Warmly,ːSpeech_Loveː CottonGameRead full article on Community Announcements (肥皂泡)AnnouncementsOfficial
Sunset Hills Kickstarter is Now Live!
Hi, everyone! Thank you very much for following and Wishlisting Sunset Hills! The Sunset Hills Kickstarter campaign is now LIVE!!! After over 5 years of hard work, we are excited to share this journey with you. Visit our Kickstarter page to support us and help us to spread the words, we REALLY NEED YOUR SUPPORT to bring this hand-drawn narrative puzzle adventure to life. In addition, we have released a new trailer featuring our latest Original Soundtrack (OST). Check it out to get a glimpse of the captivating world of Sunset Hills and the heartwarming story that awaits you. 💚🔗 🐾🎥 Thank you for your continued support. We can’t wait to embark on this adventure together! Best regards, The Cotton Game TeamRead full article on Community Announcements (iumx)Patch NotesOfficial
Small Update - Fixed a series of bugs 1.15
Thank you all for your support for The Lost Island 4: Cabin Experiment! Thanks to the feedback from players, we discovered several hidden bugs in the game during the first week and promptly made adjustments and fixes. Fixed the following bugs on certain devices during gameplay: 1.Fix Android 14 device crash issues 2.In some cases, the item bar image size was incorrect. 3.Some devices experienced a black screen and were unable to run the game. 4.Bugs related to the battery item at the beginning. 5.Some items were missing after the game is closed. 6.Rapid clicking the astronaut resulted in obtaining multiple white fruits. 7.A few errors in the text. 8.Few animation playback errors. Hope you enjoy this familiar yet unfamiliar, mysterious and unpredictable journey. {STEAM_CLAN_IMAGE}/44796978/c009108d09c608b0622305b07cb20368fca89260.pngRead full article on Community Announcements (人菜瘾大嘴硬话多)AnnouncementsOfficial
《迷失岛系列》新作《迷失岛4小屋实验》现已正式发售
The fifth game of the"ISOLAND Series," titled "ISOLAND 4: The Anchor of Memory," is now officially released. Enjoy a special 10% discount during the first week, with a sale price of 16.2 RMB. Puzzle game enthusiasts shouldn't miss out! {STEAM_CLAN_IMAGE}/44796978/6d5468e3ac055798ecb0e7e35d0de880a9c908b0.jpg Embark on a journey to this mysterious island, waking up in unfamiliar rooms. Unravel fascinating puzzles through interactions with scenes, items, and characters, ultimately revealing the secrets of the cabin experiment. But is everything you see the truth? Have you deciphered every dialogue? It's all for you to experience within the game. Lastly, as an indie game series approaching its 10th year, the success of the "ISOLAND Series" reaching its fifth installment is truly thanks to your continuous support and love. We sincerely appreciate everyone's contributions. We genuinely hope you continue to enjoy the series. As long as you still love it, we'll keep creating for this series! {STEAM_CLAN_IMAGE}/44796978/036c6bce0deb06091dd8ad0fdd19a704ade4e91d.jpgRead full article on Community Announcements (人菜瘾大嘴硬话多)






