diff --git a/Libraries/SPTarkov.Server.Core/Callbacks/GameCallbacks.cs b/Libraries/SPTarkov.Server.Core/Callbacks/GameCallbacks.cs
index 6f62070a..32eca77e 100644
--- a/Libraries/SPTarkov.Server.Core/Callbacks/GameCallbacks.cs
+++ b/Libraries/SPTarkov.Server.Core/Callbacks/GameCallbacks.cs
@@ -1,6 +1,7 @@
 using SPTarkov.DI.Annotations;
 using SPTarkov.Server.Core.Controllers;
 using SPTarkov.Server.Core.DI;
+using SPTarkov.Server.Core.Exceptions.Profile;
 using SPTarkov.Server.Core.Models.Common;
 using SPTarkov.Server.Core.Models.Eft.Common;
 using SPTarkov.Server.Core.Models.Eft.Common.Request;
@@ -42,6 +43,11 @@ public class GameCallbacks(
     /// <returns></returns>
     public ValueTask<string> GameStart(string url, EmptyRequestData _, MongoId sessionID)
     {
+        if (saveServer.IsProfileInvalidOrUnloadable(sessionID))
+        {
+            throw new ProfileIncompatibleException("This profile cannot be loaded due to it being invalid or unloadable!");
+        }
+
         var startTimestampSec = timeUtil.GetTimeStamp();
         gameController.GameStart(url, sessionID, startTimestampSec);
         return new ValueTask<string>(httpResponseUtil.GetBody(new GameStartResponse { UtcTime = startTimestampSec }));
diff --git a/Libraries/SPTarkov.Server.Core/Controllers/GameController.cs b/Libraries/SPTarkov.Server.Core/Controllers/GameController.cs
index b85fbe78..8237e877 100644
--- a/Libraries/SPTarkov.Server.Core/Controllers/GameController.cs
+++ b/Libraries/SPTarkov.Server.Core/Controllers/GameController.cs
@@ -1,4 +1,5 @@
 using SPTarkov.DI.Annotations;
+using SPTarkov.Server.Core.Exceptions.Profile;
 using SPTarkov.Server.Core.Extensions;
 using SPTarkov.Server.Core.Helpers;
 using SPTarkov.Server.Core.Models.Common;
diff --git a/Libraries/SPTarkov.Server.Core/Exceptions/Profile/ProfileIncompatibleException.cs b/Libraries/SPTarkov.Server.Core/Exceptions/Profile/ProfileIncompatibleException.cs
new file mode 100644
index 00000000..d347ea64
--- /dev/null
+++ b/Libraries/SPTarkov.Server.Core/Exceptions/Profile/ProfileIncompatibleException.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SPTarkov.Server.Core.Exceptions.Profile;
+
+public class ProfileIncompatibleException : Exception
+{
+    public ProfileIncompatibleException(string message)
+        : base(message) { }
+
+    public ProfileIncompatibleException(string message, Exception innerException)
+        : base(message, innerException) { }
+
+    public override string? StackTrace
+    {
+        get { return null; }
+    }
+}