Sanctuary Shattered Sun Demo Guide

Sanctuary: Shattered Sun is a large-scale real-time strategy game from Enhearten Media, set inside a colossal Dyson Sphere where three factions — the industrial EDA, the zealous Chosen, and the defensive Guard — wage war across ground, air, and eventually naval theaters. Chris Taylor, creator of Total Annihilation and Supreme Commander, has publicly praised the project’s scale and ambition. The free Steam demo launched on July 21, 2026 as app 2375120, giving players a hands-on preview of streaming Flux economy, commander-centric gameplay, and battles involving thousands of simulated units.

This page explains how to find, download, install, and get value from the demo before the full Early Access release. Whether you are returning to macro RTS after years away or discovering the genre through Steam’s strategy festivals, treat the demo as a structured tutorial rather than a disposable tech preview.

What the Demo Includes

The July 2026 demo is single-player only. It ships several curated scenarios that introduce core systems incrementally: extractor placement, power routing, factory queues, wreck reclamation, and faction-specific unit roles. Multiplayer, the full campaign, and naval warfare are planned for later milestones — follow our Early Access roadmap and demo patch tracker for timelines.

Each scenario plays on a slice of the Dyson Sphere’s inner surface. Distances are deceptive; what looks like a nearby hill may be kilometers away. Camera fluency matters as much as build order. Read the controls guide before your first match so Shift-queueing, attack-move, and selection filters become second nature.

System Check Before Download

Sanctuary is a pre-alpha build with heavy simulation overhead. Minimum specs require 16 GB RAM and a GTX 1050 Ti class GPU on 64-bit Windows 10 or 11. Recommended hardware targets 32 GB RAM and a GTX 1080 for smoother performance in dense fights. Linux is not supported yet — Enhearten Media notes the demo does not run properly on Linux at this stage.

Use our system requirements page for the full table and the system checker tool if you are unsure about your hardware. Running below minimum often causes stutter during large engagements, which makes learning Attack Move and Flux management harder than necessary.

How to Download on Steam

Follow these steps to install the demo through Steam app 2375120:

1. Open the official Steam demo store page while logged into your Steam account.
2. Click Play Sanctuary: Shattered Sun Demo (or Download if the button label differs by region).
3. Confirm the install location. The download is roughly 25 GB — an SSD is strongly recommended for load times and shader compilation.
4. Wait for the download and verification to complete. First launch may take several minutes while shaders build.
5. Find Sanctuary: Shattered Sun Demo in your Steam library and click Play.

If the demo does not appear, restart Steam or verify that your account region matches the store listing. Check official links for Enhearten Media community hubs if you need support.

First Launch Checklist

When the main menu loads, open Settings before jumping into a scenario. Adjust mouse sensitivity, confirm camera pan bindings, and set graphics to Medium if you notice frame drops on first contact. Edge scroll is optional but popular among RTS veterans; bind keys that match your habits from other macro games.

Choose the EDA faction for your first scenario if you want the most forgiving economic curve. The EDA faction guide explains their mass-production philosophy. Players who prefer turtling can try the Guard; experienced aggressors may enjoy the Chosen once basics click. Our faction picker tool offers a personalized recommendation.

Read the King-Piece mechanics page before pushing aggressively. Your commander is both hero unit and instant loss condition — losing it ends the match immediately, a rule that shapes every demo scenario.

Core Loop in the Demo

Every match revolves around three pillars: Flux economy, army production, and commander safety. Extractors on resource nodes feed a real-time income stream; factories and engineers drain Energy and Alloys continuously while they work. There is no traditional stockpile ceiling — pressure comes from cash flow and recession when you overspend.

Start each scenario by securing nearby nodes, linking them to your power grid, and queuing a balanced mix of units rather than spamming one type. Sanctuary simulates individual projectiles, so combined-arms groups outperform single-unit blobs. Use Attack Move to advance without babysitting every squad.

When fights end, reclaim wrecks for bonus alloys. Salvage often funds the tanks you need to break the next line. See how to reclaim wrecks for efficient routes through the battlefield.

Scenario Progression

Work through demo scenarios in the order presented. Early missions teach movement and reclamation; later ones introduce weather control and superweapons. If you stall on the opening mission, read the first mission walkthrough for objective-specific tips on power, factories, and commander positioning.

Between sessions, compare notes on our hands-on demo review and see how Sanctuary stacks against Supreme Commander on the comparison page.

After the Demo

The demo is a classroom, not the full product. Enhearten Media targets ongoing development through Early Access with multiplayer, campaign content, and community map support. Bookmark official resources for Steam news, developer streams, and community forums.

Take your time, protect your commander, and let the Dyson Sphere teach you one system at a time. When you are ready for deeper mechanics, explore Flux Economy, Wreck Reclamation, and the faction tier list.