Released Mar 17, 2026 $9.99 · −50% Mixed Counts toward your Steam games

Project Castaway

By Mardonpol Inc.

Open World Survival Craft Co-op Online Co-Op Exploration Survival Sandbox First-Person Open World MultiplayerBase BuildingUnderwaterAction

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Followers —

Reviews 1,838 Mixed

Players yesterday 57 at the busiest moment

Owners 50K–100K estimated

Project Castaway is a game tagged Open World Survival Craft, Co-op and Online Co-Op by Mardonpol Inc., released Mar 17, 2026. It has 1,838 Steam reviews (Mixed). It has an estimated 50K–100K owners on Steam. The Steam games most like it include Aurendor, Planetaries and Stranded Deep.

Project Castaway is a survival crafting title set in the Pacific Ocean. Live the life of a stranded castaway, with only yourself - and the island's inhabitants - for company! Sail the ocean, hunt, explore unique islands and gather resources as you fight for survival.

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<a href="https://launchrivals.com/games/1713350-project-castaway"><img src="https://launchrivals.com/games/1713350/badge.png" alt="Project Castaway launch date" width="320" height="84"></a>

<a href="https://launchrivals.com/games/1713350-project-castaway"><img src="https://launchrivals.com/games/1713350/badge.png?theme=light" alt="Project Castaway launch date" width="320" height="84"></a>

Aurendor 95% match · Open World Survival Craft, Co-op, Online Co-Op
Planetaries 92% match · Open World Survival Craft, Co-op, Online Co-Op
Stranded Deep 90% match · Open World Survival Craft, Co-op, Exploration
Crushed 88% match · Open World Survival Craft, Co-op, Online Co-Op
Oldowan 87% match · Open World Survival Craft, Co-op, Online Co-Op
Seaforge: Shores of Atlantis 87% match · Open World Survival Craft, Co-op, Online Co-Op
Unended 85% match · Open World Survival Craft, Co-op, Online Co-Op
ENDALOR 84% match · Open World Survival Craft, Co-op, Online Co-Op
Sunkenland 84% match · Open World Survival Craft, Co-op, Exploration
Project AlbatrOS 83% match · Open World Survival Craft, Exploration, Survival

Steam data

Everything Steam lists for Project Castaway · record updated 8 hours ago

Steam store

Overview

App ID1713350

Release dateMar 17, 2026

Last change number39931564

Last record update8 hours ago

App type: Game
Developer: Mardonpol Inc.
Publisher: Mardonpol Inc.
Steam profile: Counts toward game count and achievement totals · checked Nov 1, 2025
Website: mardonpol.com

Windows Linux

Steam Deck: Unsupported
Controller: Full support

Single-playerFull controller supportPlayStation controllersXbox controllersPlayStation controller BluetoothCo-opOnline co-opMulti-playerSteam AchievementsFamily Sharing

Patches

Build	Branch	Updated
26005294	public	Oct 17, 2026

Depots

ID	Name	Systems	Size	Download	Manifest
1713351	—	All	3.93 GB	3.52 GB	5215267450687846311

Branch	Build	Updated	Access
public	26005294	Oct 17, 2026	Open

Configuration

Install foldersteamapps/common/Project Castaway

Executable	Arguments	Systems	Description
Project Castaway.exe		All

Space per player—

Filesup to 0

Save locations0

Data from public Steam pages, updated daily; 1 day of history. Owner counts are estimates. LaunchRivals is not affiliated with Valve or Steam.

Project Castaway

About Project Castaway

Steam data

Overview

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Depots

Depots

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