Islet Online

Sandbox MMORPG about building, crafting, and shaping an ecosystem

Morenori Soft · Released Feb 11, 2019

Adventure Indie Massively Multiplayer RPG

Reviews: Mostly Positive; 77% of 540
Recent reviews: Not enough recent
Playing now: 31; right now
Steam Deck: Playable
Last update: 1 week ago; Sep 11, 2026

What is Islet Online?

This open-world sandbox MMORPG centers on digging and placing bricks to build, gathering materials to craft items, and gaining skills through your actions. Animals and plants interact, and what you do can change their ecosystem. You can play alone or with others.

For you if...

+you enjoy shaping an ecosystem through your actions
+you want open-ended play alone or with others

Not for you if...

−you want quests to guide each step of progression

What players say

77% of 540 reviews are positive

Players praise the crafting but complain that other players rarely interact.

Screenshots and trailer

Islet Online system requirements

As published by the developer.

Minimum

OS: Windows XP or later
Processor: Core 2 Duo
Graphics: Shader Model 3.0
Memory: 2 GB RAM
Storage: 1 GB available space
DirectX: Version 9.0c

PC version details

DRM, required accounts, controller support and Steam features.

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows
Achievements: 10
Steam features: Cloud saves, Family Sharing, Trading cards, In-app purchases

Steam Deck: Playable

Default controller config not fully functional
Sometimes shows mouse, keyboard or non-Deck controller icons
Some text entry requires manually opening the on-screen keyboard
Some in-game text is small and may be hard to read
The native resolution is not the default one
Default graphics settings perform well on Steam Deck
Singleplayer gameplay requires active internet connection

Multiplayer and co-op

Languages

Text only: English, Simplified Chinese, Russian, Korean, Vietnamese, Traditional Chinese, Filipino, French, Spanish - Spain, Indonesian, Thai, Portuguese - Brazil, Portuguese - Portugal, Spanish - Latin America, Japanese.