diff --git a/osu.Desktop/OsuGameDesktop.cs b/osu.Desktop/OsuGameDesktop.cs
index 4bd51cdb09..677a22a2d5 100644
--- a/osu.Desktop/OsuGameDesktop.cs
+++ b/osu.Desktop/OsuGameDesktop.cs
@@ -110,7 +110,7 @@ public OsuGameDesktop(string[]? args = null)
 
         protected override UpdateManager CreateUpdateManager()
         {
-            return new NoActionUpdateManager();
+            return new GitHubReleaseUpdateManager();
         }
 
         public override bool RestartAppWhenExited()
diff --git a/osu.Game/OsuGameBase.cs b/osu.Game/OsuGameBase.cs
index 5c8871142b..31d4833146 100644
--- a/osu.Game/OsuGameBase.cs
+++ b/osu.Game/OsuGameBase.cs
@@ -118,7 +118,7 @@ public virtual EndpointConfiguration CreateEndpoints() =>
 
         public bool IsDeployedBuild => AssemblyVersion.Major > 0;
 
-        internal const string BUILD_SUFFIX = @"TEST-Open";
+        internal const string BUILD_SUFFIX = @"LGA";
 
         public virtual string Version
         {
diff --git a/osu.Game/Updater/GitHubReleaseUpdateManager.cs b/osu.Game/Updater/GitHubReleaseUpdateManager.cs
new file mode 100644
index 0000000000..cda883fdb0
--- /dev/null
+++ b/osu.Game/Updater/GitHubReleaseUpdateManager.cs
@@ -0,0 +1,75 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Linq;
+using System.Threading.Tasks;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Platform;
+using osu.Game.Online.API;
+using osu.Game.Overlays.Notifications;
+
+namespace osu.Game.Updater
+{
+    /// <summary>
+    /// An update manager that shows notifications if a newer release is detected.
+    /// This is a case where updates are handled externally by a package manager or other means, so no action is performed on clicking the notification.
+    /// </summary>
+    public partial class GitHubReleaseUpdateManager : UpdateManager
+    {
+        private string version = null!;
+
+        [Resolved]
+        private GameHost host { get; set; } = null!;
+
+        [BackgroundDependencyLoader]
+        private void load(OsuGameBase game)
+        {
+            version = game.Version;
+        }
+
+        protected override async Task<bool> PerformUpdateCheck()
+        {
+            try
+            {
+                var releases = new OsuJsonWebRequest<GitHubRelease>(@"https://api.github.com/repos/ILW8/osu-TEST-Open/releases/latest");
+
+                await releases.PerformAsync().ConfigureAwait(false);
+
+                var latest = releases.ResponseObject;
+
+                if (latest == null)
+                    return false;
+
+                // avoid any discrepancies due to build suffixes for now.
+                // eventually we will want to support release streams and consider these.
+                version = version.Split('-').First();
+                string latestTagName = latest.TagName.Split('-').First();
+
+                if (latestTagName != version)
+                {
+                    Notifications.Post(new SimpleNotification
+                    {
+                        Text = $"A newer release of osu! has been found ({version} → {latestTagName}).\n\n"
+                               + "Click here to open the downloads page!",
+                        Icon = FontAwesome.Solid.Download,
+                        Activated = () =>
+                        {
+                            host.OpenUrlExternally(latest.HtmlUrl);
+                            return true;
+                        }
+                    });
+
+                    return true;
+                }
+            }
+            catch
+            {
+                // we shouldn't crash on a web failure. or any failure for the matter.
+                return true;
+            }
+
+            return false;
+        }
+    }
+}