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ISOLAND4: The Anchor of Memory

ISOLAND4: The Anchor of Memory

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.

Released Jan 9, 2024 Developer Cotton Game Platforms Windows · Mac CasualAdventurePuzzleExplorationClicker
View on Steam ↗ $2.99 (US · as of 2026-05-14)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.

87.5%positive168 reviews
Recommended · 2 found this helpful

“I think I enjoyed this one a bit more than the previous efforts. These guys continue to improve! Another solid 5-6 hours of fun puzzling. Easy recommendation, especially considering the ridiculously low asking price!”

— a player, Steam review · 7 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. History through 2025-06 via SteamCharts; self-collected from the Steam API since Aug 2026.

61all-time peak
0 5 10 2025 No data collected for this period No data collected for this period 9 avg · Jan 2024

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

21achievements
80.0%median completion
38.9%rarest: Listen attentively
98.1% of players 94.2% of players 92.2% of players 90.7% of players 88.3% of players 86.2% of players 83.6% of players 81.9% of players 81.4% of players 81.4% of players 80.0% of players 79.2% of players 67.6% of players 61.2% of players 58.9% of players 55.3% of players 52.1% of players 46.0% of players 44.3% of players 44.2% of players 38.9% of players 98.1% 0% most earned rarest
Almost everyone has
98.1%Smooth landing — Accompanying the astronaut to the mysterious room.!!br0ken!!
94.2%Time Travel — Enable the small navy to successfully reach the parallel world.
92.2%The Memory of a Butterfly — Release the hidden butterflies somewhere.
Rarest badges of honor
38.9%Listen attentively — Listen to the elder finish his story.
44.2%The Secret of the Cabin — Uncover the secrets of the cabin experiment.
44.3%Seaside Sonata — Play a song for the lonely person.

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Dec 27, 2024
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 de

Jun 29, 2024
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

Jan 15, 2024
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 adjus

Jan 10, 2024
《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 g

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Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-26.

GenresAdventure, Casual, Indie, Strategy
Player tagsCasual · Adventure · Puzzle · Exploration · Clicker · 2D · Indie · Hand-drawn · Stylized · Drama · Detective · Sci-fi (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Captions available · Steam Cloud · Remote Play on Phone · Remote Play on Tablet · Family Sharing
LanguagesEnglish, French, Spanish - Spain, Russian, Japanese, Simplified Chinese, Traditional Chinese, Arabic, Indonesian, Korean, German
Achievements21
Official sitehttp://www.cottongame.com
Minimum system requirements (PC)

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