diff --git a/SabreTools.RedumpLib.Test/Data/ExtensionsTests.cs b/SabreTools.RedumpLib.Test/Data/ExtensionsTests.cs
index c942487..b672745 100644
--- a/SabreTools.RedumpLib.Test/Data/ExtensionsTests.cs
+++ b/SabreTools.RedumpLib.Test/Data/ExtensionsTests.cs
@@ -720,6 +720,7 @@ public void Region_ToRegion(Region? region, bool expectNull)
             SiteCode.Series,
             SiteCode.SSHash,
             SiteCode.SSVersion,
+            SiteCode.SteamAppID,
             SiteCode.TitleID,
             SiteCode.UniversalHash,
             SiteCode.VCD,
@@ -772,6 +773,8 @@ public void Region_ToRegion(Region? region, bool expectNull)
             SiteCode.PlayableDemos,
             SiteCode.RollingDemos,
             SiteCode.Savegames,
+            SiteCode.Steam2DepotID,
+            SiteCode.Steam3DepotID,
             SiteCode.TechDemos,
             SiteCode.Videos,
         ];
@@ -792,6 +795,8 @@ public void Region_ToRegion(Region? region, bool expectNull)
             SiteCode.PlayableDemos,
             SiteCode.RollingDemos,
             SiteCode.Savegames,
+            SiteCode.Steam2DepotID,
+            SiteCode.Steam3DepotID,
             SiteCode.TechDemos,
             SiteCode.Videos,
         ];
diff --git a/SabreTools.RedumpLib/Data/Enumerations.cs b/SabreTools.RedumpLib/Data/Enumerations.cs
index aad58e7..30c39f2 100644
--- a/SabreTools.RedumpLib/Data/Enumerations.cs
+++ b/SabreTools.RedumpLib/Data/Enumerations.cs
@@ -3725,6 +3725,18 @@ public enum SiteCode
         [HumanReadable(ShortName = "<b>SS version</b>:", LongName = "<b>SS version</b>:")]
         SSVersion,
 
+        // This doesn't have a site tag yet
+        [HumanReadable(ShortName = "<b>Steam AppID</b>:", LongName = "<b>Steam AppID</b>:")]
+        SteamAppID,
+        
+        // This doesn't have a site tag yet
+        [HumanReadable(ShortName = "<b>Steam Depot ID (.sis/.sim/.sid)</b>:", LongName = "<b>Steam Depot ID (.sis/.sim/.sid)</b>:")]
+        Steam2DepotID,
+        
+        // This doesn't have a site tag yet
+        [HumanReadable(ShortName = "<b>Steam Depot ID (.sis/.csm/.csd)</b>:", LongName = "<b>Steam Depot ID (.sis/.csm/.csd)</b>:")]
+        Steam3DepotID,
+
         [HumanReadable(ShortName = "[T:TID]", LongName = "<b>Taito ID</b>:")]
         TaitoID,
 
diff --git a/SabreTools.RedumpLib/Data/Extensions.cs b/SabreTools.RedumpLib/Data/Extensions.cs
index 64768ce..0c2b8f0 100644
--- a/SabreTools.RedumpLib/Data/Extensions.cs
+++ b/SabreTools.RedumpLib/Data/Extensions.cs
@@ -1277,6 +1277,7 @@ public static bool IsCommentCode(this SiteCode? siteCode)
                 SiteCode.Series => true,
                 SiteCode.SSHash => true,
                 SiteCode.SSVersion => true,
+                SiteCode.SteamAppID => true,
                 SiteCode.TitleID => true,
                 SiteCode.UniversalHash => true,
                 SiteCode.VCD => true,
@@ -1342,6 +1343,8 @@ public static bool IsContentCode(this SiteCode? siteCode)
                 SiteCode.PlayableDemos => true,
                 SiteCode.RollingDemos => true,
                 SiteCode.Savegames => true,
+                SiteCode.Steam2DepotID => true,
+                SiteCode.Steam3DepotID => true,
                 SiteCode.TechDemos => true,
                 SiteCode.Videos => true,
                 _ => false,
@@ -1374,6 +1377,8 @@ public static bool IsMultiLine(this SiteCode? siteCode)
                 SiteCode.PlayableDemos => true,
                 SiteCode.RollingDemos => true,
                 SiteCode.Savegames => true,
+                SiteCode.Steam2DepotID => true,
+                SiteCode.Steam3DepotID => true,
                 SiteCode.TechDemos => true,
                 SiteCode.Videos => true,
                 _ => false,
diff --git a/SabreTools.RedumpLib/Formatter.cs b/SabreTools.RedumpLib/Formatter.cs
index 13bd2f7..be7a753 100644
--- a/SabreTools.RedumpLib/Formatter.cs
+++ b/SabreTools.RedumpLib/Formatter.cs
@@ -56,6 +56,8 @@ public static class Formatter
             SiteCode.Series,
             SiteCode.PostgapType,
             SiteCode.VCD,
+            
+            SiteCode.SteamAppID,
 
             // Publisher / Company IDs
             SiteCode.AcclaimID,
@@ -101,6 +103,8 @@ public static class Formatter
             // Games
             SiteCode.Games,
             SiteCode.NetYarozeGames,
+            SiteCode.Steam2DepotID,
+            SiteCode.Steam3DepotID,
 
             // Demos
             SiteCode.PlayableDemos,