diff --git a/algo/qmc/cipher_map_test.go b/algo/qmc/cipher_map_test.go
index f3a4b98..400ef94 100644
--- a/algo/qmc/cipher_map_test.go
+++ b/algo/qmc/cipher_map_test.go
@@ -1,40 +1,53 @@
 package qmc
 
 import (
+	"fmt"
 	"os"
 	"reflect"
 	"testing"
 )
 
-func loadTestMapCipherData() ([]byte, []byte, []byte, error) {
-	key, err := os.ReadFile("./testdata/mflac_map_key.bin")
+func loadTestDataMapCipher(name string) ([]byte, []byte, []byte, error) {
+	key, err := os.ReadFile(fmt.Sprintf("./testdata/%s_key.bin", name))
 	if err != nil {
 		return nil, nil, nil, err
 	}
-	raw, err := os.ReadFile("./testdata/mflac_map_raw.bin")
+	raw, err := os.ReadFile(fmt.Sprintf("./testdata/%s_raw.bin", name))
 	if err != nil {
 		return nil, nil, nil, err
 	}
-	target, err := os.ReadFile("./testdata/mflac_map_target.bin")
+	target, err := os.ReadFile(fmt.Sprintf("./testdata/%s_target.bin", name))
 	if err != nil {
 		return nil, nil, nil, err
 	}
 	return key, raw, target, nil
 }
 func Test_mapCipher_Decrypt(t *testing.T) {
-	key, raw, target, err := loadTestMapCipherData()
-	if err != nil {
-		t.Fatalf("load testing data failed: %s", err)
+
+	tests := []struct {
+		name    string
+		wantErr bool
+	}{
+		{"mflac_map", false},
+		{"mgg_map", false},
+	}
+
+	for _, tt := range tests {
+
+		t.Run(tt.name, func(t *testing.T) {
+			key, raw, target, err := loadTestDataMapCipher(tt.name)
+			if err != nil {
+				t.Fatalf("load testing data failed: %s", err)
+			}
+			c, err := NewMapCipher(key)
+			if err != nil {
+				t.Errorf("init mapCipher failed: %s", err)
+				return
+			}
+			c.Decrypt(raw, 0)
+			if !reflect.DeepEqual(raw, target) {
+				t.Error("overall")
+			}
+		})
 	}
-	t.Run("overall", func(t *testing.T) {
-		c, err := NewMapCipher(key)
-		if err != nil {
-			t.Errorf("init mapCipher failed: %s", err)
-			return
-		}
-		c.Decrypt(raw, 0)
-		if !reflect.DeepEqual(raw, target) {
-			t.Error("overall")
-		}
-	})
 }
diff --git a/algo/qmc/qmc_test.go b/algo/qmc/qmc_test.go
index f8fd0bf..6209b15 100644
--- a/algo/qmc/qmc_test.go
+++ b/algo/qmc/qmc_test.go
@@ -33,6 +33,7 @@ func TestMflac0Decoder_Read(t *testing.T) {
 	}{
 		{"mflac0_rc4", false},
 		{"mflac_map", false},
+		{"mgg_map", false},
 		{"qmc0_static", false},
 	}
 
@@ -69,6 +70,7 @@ func TestMflac0Decoder_Validate(t *testing.T) {
 	}{
 		{"mflac0_rc4", ".flac", false},
 		{"mflac_map", ".flac", false},
+		{"mgg_map", ".ogg", false},
 		{"qmc0_static", ".mp3", false},
 	}
 
diff --git a/algo/qmc/testdata/mgg_map_key.bin b/algo/qmc/testdata/mgg_map_key.bin
new file mode 100644
index 0000000..fecf089
--- /dev/null
+++ b/algo/qmc/testdata/mgg_map_key.bin
@@ -0,0 +1 @@
+zGxNk54pKJ0hDkAo80wHE80ycSWQ7z4m4E846zVy2sqCn14F42Y5S7GqeR11WpOV75sDLbE5dFP992t88l0pHy1yAQ49YK6YX6c543drBYLo55Hc4Y0Fyic6LQPiGqu2bG31r8vaq9wS9v63kg0X5VbnOD6RhO4t0RRhk3ajrA7p0iIy027z0L70LZjtw6E18H0D41nz6ASTx71otdF9z1QNC0JmCl51xvnb39zPExEXyKkV47S6QsK5hFh884QJ
\ No newline at end of file
diff --git a/algo/qmc/testdata/mgg_map_key_raw.bin b/algo/qmc/testdata/mgg_map_key_raw.bin
new file mode 100644
index 0000000..bea6675
--- /dev/null
+++ b/algo/qmc/testdata/mgg_map_key_raw.bin
@@ -0,0 +1 @@
+ekd4Tms1NHC53JEDO/AKVyF+I0bj0hHB7CZeoLDGSApaQB9Oo/pJTBGA/RO+nk5RXLXdHsffLiY4e8kt3LNo6qMl7S89vkiSFxx4Uoq4bGDJ7Jc+bYL6lLsa3M4sBvXS4XcPChrMDz+LmrJMGG6ua2fYyIz1d6TCRUBf1JJgCIkBbDAEeMVYc13qApitiz/apGAPmAnveCaDhfD5GxWsF+RfQ2OcnvrnIXe80Feh/0jx763DlsOBI3eIede6t5zYHokWkZmVEF1jMrnlvsgbQK2EzUWMblmLMsTKNILyZazEoKUyulqmyLO/c/KYE+USPOXPcbjlYFmLhSGHK7sQB5aBR153Yp+xh61ooh2NGAA=
\ No newline at end of file
diff --git a/algo/qmc/testdata/mgg_map_raw.bin b/algo/qmc/testdata/mgg_map_raw.bin
new file mode 100644
index 0000000..fa8704d
Binary files /dev/null and b/algo/qmc/testdata/mgg_map_raw.bin differ
diff --git a/algo/qmc/testdata/mgg_map_suffix.bin b/algo/qmc/testdata/mgg_map_suffix.bin
new file mode 100644
index 0000000..671d61e
Binary files /dev/null and b/algo/qmc/testdata/mgg_map_suffix.bin differ
diff --git a/algo/qmc/testdata/mgg_map_target.bin b/algo/qmc/testdata/mgg_map_target.bin
new file mode 100644
index 0000000..f318eb9
Binary files /dev/null and b/algo/qmc/testdata/mgg_map_target.bin differ