Mortar finds your games on Steam, GOG, Epic Games, the EA app, the Xbox app, Heroic, Lutris, Minigalaxy or Bottles, installs their mod loader, keeps each set of mods in its own profile, explains mod conflicts, downloads from Nexus Mods, CurseForge, Modrinth, Thunderstore, GitHub, itch.io and the Vintage Story Mod DB, and shares a profile as a link. It supports Stardew Valley, Lethal Company, Valheim, Vintage Story, The Sims 4 and many Thunderstore games.
Publisher’s description
What is Mortar?
Mortar by Rethunk.Tech is open-source Windows software in the launchers & mods category.
Installation and requirements
The publisher provides EXE (NSIS) installers for 64-bit and ARM64 Windows. It can be installed for the current user only, without administrator rights. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 0.5.0, released on November 4, 2026. The version history goes back to October 30, 2026: 2 releases, all linked to the official files. The last update is less than a month old.
Popularity and file types
On Windows it registers 1 file type, including .mortar. Similar programs include Vortex, LOOT and Mod Organizer.
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Documented silent install
- Installs without administrator rights
- Updated in the last two months
In short: Mortar is an open-source launchers & mod tool for 64-bit and ARM64 PCs. Administrators can deploy it unattended.
Is Mortar safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
7EB505DA623692BED3127B9F7B65FB04BCC2FC957E4CF16CB53CB7D0B3798044· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 2 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 0.5.0Latest | November 4, 2026 | — | ARM64 EXE (NSIS)64-bit EXE (NSIS) |
| 0.3.16 | October 30, 2026 | — | ARM64 EXE (NSIS)64-bit EXE (NSIS) |
Install from the command line
Silent install ›winget install --id RethunkTech.Mortar -emortar-amd64-installer.exe /SRelated guide: How to use winget: install and update apps
Information
- Publisher
- Rethunk.Tech
- Category
- Launchers & mods
- Licence
- AGPL-3.0-only
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64
- Installer
- EXE (NSIS)
- Version
- 0.5.0
- Released
- November 4, 2026
- Added to the catalogue
- November 4, 2026
- Versions listed
- 2
- Website
- mortar.rethunk.tech
- winget ID
- RethunkTech.Mortar
File types it opens (1)
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Mortar free?
Yes. Mortar is open-source software under the AGPL-3.0-only licence.
Is Mortar safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Mortar with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Mortar be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Mortar run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of Mortar?
The versions page lists all 2 versions with links to their official installer files, back to October 30, 2026.
Can I use Mortar without administrator rights?
Yes, there is a per-user installer that does not need administrator rights.
What are alternatives to Mortar?
Vortex, LOOT, Mod Organizer, SteamCleaner and Achievement Watcher. The alternatives page compares them.
