diff --git a/SabreTools.Metadata.Filter.Test/FilterObjectTests.cs b/SabreTools.Metadata.Filter.Test/FilterObjectTests.cs
index 6cb95ee8..02207af0 100644
--- a/SabreTools.Metadata.Filter.Test/FilterObjectTests.cs
+++ b/SabreTools.Metadata.Filter.Test/FilterObjectTests.cs
@@ -1490,5 +1490,101 @@ namespace SabreTools.Metadata.Filter.Test
         }
 
         #endregion
+
+        #region RamOption
+
+        [Theory]
+        [InlineData("ramoption.content", "content")]
+        [InlineData("ramoption.default", "yes")]
+        [InlineData("ramoption.name", "name")]
+        public void Matches_RamOption(string itemField, string value)
+        {
+            var filter = new FilterObject(itemField, value, Operation.Equals);
+            RamOption obj = new RamOption
+            {
+                Content = "content",
+                Default = true,
+                Name = "name",
+            };
+
+            bool actual = filter.Matches(obj);
+            Assert.True(actual);
+        }
+
+        #endregion
+
+        #region Release
+
+        [Theory]
+        [InlineData("release.date", "date")]
+        [InlineData("release.default", "yes")]
+        [InlineData("release.language", "language")]
+        [InlineData("release.name", "name")]
+        [InlineData("release.region", "region")]
+        public void Matches_Release(string itemField, string value)
+        {
+            var filter = new FilterObject(itemField, value, Operation.Equals);
+            Release obj = new Release
+            {
+                Date = "date",
+                Default = true,
+                Language = "language",
+                Name = "name",
+                Region = "region",
+            };
+
+            bool actual = filter.Matches(obj);
+            Assert.True(actual);
+        }
+
+        #endregion
+
+        #region ReleaseDetails
+
+        [Theory]
+        [InlineData("releasedetails.appendtonumber", "appendtonumber")]
+        [InlineData("releasedetails.archivename", "archivename")]
+        [InlineData("releasedetails.category", "category")]
+        [InlineData("releasedetails.comment", "comment")]
+        [InlineData("releasedetails.date", "date")]
+        [InlineData("releasedetails.dirname", "dirname")]
+        [InlineData("releasedetails.group", "group")]
+        [InlineData("releasedetails.id", "id")]
+        [InlineData("releasedetails.nfocrc", "nfocrc")]
+        [InlineData("releasedetails.nfoname", "nfoname")]
+        [InlineData("releasedetails.nfosize", "nfosize")]
+        [InlineData("releasedetails.origin", "origin")]
+        [InlineData("releasedetails.originalformat", "originalformat")]
+        [InlineData("releasedetails.region", "region")]
+        [InlineData("releasedetails.rominfo", "rominfo")]
+        [InlineData("releasedetails.tool", "tool")]
+        public void Matches_ReleaseDetails(string itemField, string value)
+        {
+            var filter = new FilterObject(itemField, value, Operation.Equals);
+            ReleaseDetails obj = new ReleaseDetails
+            {
+                AppendToNumber = "appendtonumber",
+                ArchiveName = "archivename",
+                Category = "category",
+                Comment = "comment",
+                Date = "date",
+                DirName = "dirname",
+                Group = "group",
+                Id = "id",
+                NfoCRC = "nfocrc",
+                NfoName = "nfoname",
+                NfoSize = "nfosize",
+                Origin = "origin",
+                OriginalFormat = "originalformat",
+                Region = "region",
+                RomInfo = "rominfo",
+                Tool = "tool",
+            };
+
+            bool actual = filter.Matches(obj);
+            Assert.True(actual);
+        }
+
+        #endregion
     }
 }
diff --git a/SabreTools.Metadata.Filter/FilterKey.cs b/SabreTools.Metadata.Filter/FilterKey.cs
index 4e35717a..da454a00 100644
--- a/SabreTools.Metadata.Filter/FilterKey.cs
+++ b/SabreTools.Metadata.Filter/FilterKey.cs
@@ -516,6 +516,51 @@ namespace SabreTools.Metadata.Filter
             "tag",
         ];
 
+        /// <summary>
+        /// Known keys for RamOption
+        /// </summary>
+        private static readonly string[] _ramOptionKeys =
+        [
+            "content",
+            "default",
+            "name",
+        ];
+
+        /// <summary>
+        /// Known keys for Release
+        /// </summary>
+        private static readonly string[] _releaseKeys =
+        [
+            "date",
+            "default",
+            "language",
+            "name",
+            "region",
+        ];
+
+        /// <summary>
+        /// Known keys ReleaseDetails Release
+        /// </summary>
+        private static readonly string[] _releaseDetailsKeys =
+        [
+            "appendtonumber",
+            "archivename",
+            "category",
+            "comment",
+            "date",
+            "dirname",
+            "group",
+            "id",
+            "nfocrc",
+            "nfoname",
+            "nfosize",
+            "origin",
+            "originalformat",
+            "region",
+            "rominfo",
+            "tool",
+        ];
+
         #endregion
 
         /// <summary>
@@ -723,6 +768,9 @@ namespace SabreTools.Metadata.Filter
                 "original" => _originalKeys,
                 "part" => _partKeys,
                 "port" => _portKeys,
+                "ramoption" => _ramOptionKeys,
+                "release" => _releaseKeys,
+                "releasedetails" => _releaseDetailsKeys,
                 _ => null,
             };