diff --git a/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.installer.yaml b/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.installer.yaml
new file mode 100644
index 00000000000..e43ad26956b
--- /dev/null
+++ b/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.installer.yaml
@@ -0,0 +1,20 @@
+# Created by Anthelion using komac v2.16.0
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.installer.1.12.0.schema.json
+
+PackageIdentifier: Modrinth.ModrinthApp
+PackageVersion: 0.21.3
+InstallerType: nullsoft
+Scope: user
+ProductCode: Modrinth App
+ReleaseDate: 2026-09-15
+AppsAndFeaturesEntries:
+- Publisher: ModrinthApp
+  ProductCode: Modrinth App
+InstallationMetadata:
+  DefaultInstallLocation: '%LocalAppData%\Modrinth App'
+Installers:
+- Architecture: x64
+  InstallerUrl: https://launcher-files.modrinth.com/versions/0.21.3/windows/Modrinth%20App_0.21.3_x64-setup.exe
+  InstallerSha256: E3C5C46391051C6F980F29009FE52B9B907709F8AD690B241CA38FEF6BE7FCB9
+ManifestType: installer
+ManifestVersion: 1.12.0
diff --git a/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.locale.en-US.yaml b/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.locale.en-US.yaml
new file mode 100644
index 00000000000..cb81c133dc9
--- /dev/null
+++ b/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.locale.en-US.yaml
@@ -0,0 +1,32 @@
+# Created by Anthelion using komac v2.16.0
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.defaultLocale.1.12.0.schema.json
+
+PackageIdentifier: Modrinth.ModrinthApp
+PackageVersion: 0.21.3
+PackageLocale: en-US
+Publisher: Modrinth
+PublisherUrl: https://modrinth.com/
+PublisherSupportUrl: https://support.modrinth.com/en/
+PrivacyUrl: https://modrinth.com/legal/privacy
+Author: Modrinth
+PackageName: Modrinth App
+PackageUrl: https://modrinth.com/app
+License: GPL-3.0
+LicenseUrl: https://github.com/modrinth/code/blob/main/apps/app/LICENSE
+ShortDescription: The Modrinth App is a unique, open source Minecraft launcher that allows you to play your favorite mods, and keep them up to date, all in one neat little package.
+Tags:
+- minecraft
+- minecraft-launcher
+- modrinth
+ReleaseNotes: |-
+  Added
+  - Added validation of Minecraft libraries on launch.
+
+  Changed
+  - Reverted usage of links instead of duplicated content due to issues with a couple mods.
+ReleaseNotesUrl: https://github.com/modrinth/code/releases/tag/v0.21.3
+Documentations:
+- DocumentLabel: Docs
+  DocumentUrl: https://support.modrinth.com/en/collections/7804910-modrinth-app
+ManifestType: defaultLocale
+ManifestVersion: 1.12.0
diff --git a/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.yaml b/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.yaml
new file mode 100644
index 00000000000..2399804859b
--- /dev/null
+++ b/manifests/m/Modrinth/ModrinthApp/0.21.3/Modrinth.ModrinthApp.yaml
@@ -0,0 +1,8 @@
+# Created by Anthelion using komac v2.16.0
+# yaml-language-server: $schema=https://aka.ms/winget-manifest.version.1.12.0.schema.json
+
+PackageIdentifier: Modrinth.ModrinthApp
+PackageVersion: 0.21.3
+DefaultLocale: en-US
+ManifestType: version
+ManifestVersion: 1.12.0