diff --git a/src/Tgstation.Server.Api/Models/OAuthProvider.cs b/src/Tgstation.Server.Api/Models/OAuthProvider.cs
index 0581cf3369..bc766e0bcc 100644
--- a/src/Tgstation.Server.Api/Models/OAuthProvider.cs
+++ b/src/Tgstation.Server.Api/Models/OAuthProvider.cs
@@ -1,4 +1,6 @@
-using Newtonsoft.Json;
+using System;
+
+using Newtonsoft.Json;
 using Newtonsoft.Json.Converters;
 
 namespace Tgstation.Server.Api.Models
@@ -20,8 +22,9 @@ namespace Tgstation.Server.Api.Models
 		Discord,
 
 		/// <summary>
-		/// https://tgstation13.org.
+		/// Pre-hostening https://tgstation13.org. No longer supported.
 		/// </summary>
+		[Obsolete("tgstation13.org no longer has a custom OAuth solution", true)]
 		TGForums,
 
 		/// <summary>
diff --git a/src/Tgstation.Server.Host/GraphQL/Types/OAuth/OAuthProviderInfos.cs b/src/Tgstation.Server.Host/GraphQL/Types/OAuth/OAuthProviderInfos.cs
index da9bffe4b3..87f486120a 100644
--- a/src/Tgstation.Server.Host/GraphQL/Types/OAuth/OAuthProviderInfos.cs
+++ b/src/Tgstation.Server.Host/GraphQL/Types/OAuth/OAuthProviderInfos.cs
@@ -58,7 +58,6 @@ namespace Tgstation.Server.Host.GraphQL.Types.OAuth
 
 			Discord = TryBuild(OAuthProvider.Discord, info => new BasicOAuthProviderInfo(info));
 			GitHub = TryBuild(OAuthProvider.GitHub, info => new RedirectOAuthProviderInfo(info));
-			TGForums = TryBuild(OAuthProvider.TGForums, info => new RedirectOAuthProviderInfo(info));
 			Keycloak = TryBuild(OAuthProvider.Keycloak, info => new FullOAuthProviderInfo(info));
 			InvisionCommunity = TryBuild(OAuthProvider.InvisionCommunity, info => new FullOAuthProviderInfo(info));
 		}
diff --git a/src/Tgstation.Server.Host/Security/OAuth/OAuthProviders.cs b/src/Tgstation.Server.Host/Security/OAuth/OAuthProviders.cs
index 5b5af32ba9..8e631eea0f 100644
--- a/src/Tgstation.Server.Host/Security/OAuth/OAuthProviders.cs
+++ b/src/Tgstation.Server.Host/Security/OAuth/OAuthProviders.cs
@@ -57,13 +57,6 @@ namespace Tgstation.Server.Host.Security.OAuth
 						loggerFactory.CreateLogger<DiscordOAuthValidator>(),
 						discordConfig));
 
-			if (securityConfiguration.OAuth.TryGetValue(OAuthProvider.TGForums, out var tgConfig))
-				validatorsBuilder.Add(
-					new TGForumsOAuthValidator(
-						httpClientFactory,
-						loggerFactory.CreateLogger<TGForumsOAuthValidator>(),
-						tgConfig));
-
 			if (securityConfiguration.OAuth.TryGetValue(OAuthProvider.Keycloak, out var keyCloakConfig))
 				validatorsBuilder.Add(
 					new KeycloakOAuthValidator(
diff --git a/src/Tgstation.Server.Host/Security/OAuth/TGForumsOAuthValidator.cs b/src/Tgstation.Server.Host/Security/OAuth/TGForumsOAuthValidator.cs
deleted file mode 100644
index c81a54ec73..0000000000
--- a/src/Tgstation.Server.Host/Security/OAuth/TGForumsOAuthValidator.cs
+++ /dev/null
@@ -1,51 +0,0 @@
-using System;
-
-using Microsoft.Extensions.Logging;
-
-using Tgstation.Server.Api.Models;
-using Tgstation.Server.Common.Http;
-using Tgstation.Server.Host.Configuration;
-
-namespace Tgstation.Server.Host.Security.OAuth
-{
-	/// <summary>
-	/// <see cref="IOAuthValidator"/> for /tg/ forums.
-	/// </summary>
-	sealed class TGForumsOAuthValidator : GenericOAuthValidator
-	{
-		/// <inheritdoc />
-		public override OAuthProvider Provider => OAuthProvider.TGForums;
-
-		/// <inheritdoc />
-		protected override Uri TokenUrl => new("https://tgstation13.org/phpBB/app.php/tgapi/oauth/token");
-
-		/// <inheritdoc />
-		protected override Uri UserInformationUrl => new("https://tgstation13.org/phpBB/app.php/tgapi/user/me");
-
-		/// <summary>
-		/// Initializes a new instance of the <see cref="TGForumsOAuthValidator"/> class.
-		/// </summary>
-		/// <param name="httpClientFactory">The <see cref="IAbstractHttpClientFactory"/> for the <see cref="GenericOAuthValidator"/>.</param>
-		/// <param name="logger">The <see cref="ILogger"/> for the <see cref="GenericOAuthValidator"/>.</param>
-		/// <param name="oAuthConfiguration">The <see cref="OAuthConfiguration"/> for the <see cref="GenericOAuthValidator"/>.</param>
-		public TGForumsOAuthValidator(
-			IAbstractHttpClientFactory httpClientFactory,
-			ILogger<TGForumsOAuthValidator> logger,
-			OAuthConfiguration oAuthConfiguration)
-			: base(
-				 httpClientFactory,
-				 logger,
-				 oAuthConfiguration)
-		{
-		}
-
-		/// <inheritdoc />
-		protected override string DecodeTokenPayload(dynamic responseJson) => responseJson.access_token;
-
-		/// <inheritdoc />
-		protected override string DecodeUserInformationPayload(dynamic responseJson) => responseJson.phpbb_username;
-
-		/// <inheritdoc />
-		protected override OAuthTokenRequest CreateTokenRequest(string code) => new(OAuthConfiguration, code, "user");
-	}
-}