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RT2 - RText Localization File

Applies to: GT4, GT5, GTPSP, GT6, GT7 · Extension: .rt2

RT2 Stands for RText 2 (Region Text 2?).

They are key-value dictionaries for localized text.

Editing

GT.RText by Razer2015 can be used to edit these files.

A C# library is also available - PDTools.RText by Nenkai


RT05 (RTextV5)

Applies to GT Sport, GT7 · Endian: Big (GT5/GT6) · Little (GT4, GT Sport, GT7)

Size: 0x20

Field Offset Type Description
RT0x 0x00 Int Magic, (Enforced, cannot be different)
Page Count 0x04 Int Number of pages (categories) in the RText
Unknown 0x08 Byte This field is not read
Relocation Pointer 0x10 Int Relocation Pointer
Padding Until 0x20 Byte N/A

Page

Size: 0x10

Field Offset Type Description
Page Name Pointer 0x00 Int String Offset to Name (Zero-terminated)
Pair Count 0x04 Int Number of pairs in this category
Empty 0x08 Int N/A
Pairs Pointer 0x0C Pair* Offset to the pairs

Pair

Size: 0x10

Field Offset Type Description
ID 0x00 UInt String Offset to Name (Zero-terminated)
Label Name Length 0x04 UShort Length of the label string
Value Name Length 0x06 UShort Length of the value string
Label String Pointer 0x08 char* Offset to the key's encrypted label (Zero-terminated)
Value String Pointer 0x0C char* Offset to the key's encrypted value (Zero-terminated)

Encryption

The content is encrypted with Salsa20, use the following sample code to decrypt it:

static string Key = "majimenihataraiteimasu";

static byte[] Decrypt(byte[] encrypted, string key)
{
    if (encrypted.Length == 0)
        return encrypted;

    using (SymmetricAlgorithm salsa20 = new Salsa20SymmetricAlgorithm())
    {
        var dataKey = new byte[8];
        var keyBytes = Encoding.UTF8.GetBytes(key);
        byte[] decrypted = new byte[encrypted.Length];
        using (var decrypt = salsa20.CreateDecryptor(keyBytes, dataKey))
            decrypt.TransformBlock(encrypted, 0, encrypted.Length, decrypted, 0);

        return decrypted;
    }
}

[...]

Decrypt(..., Key);

RT04 (RTextV4)

Applies to GTPSP, GT5 · Endian: Big (GT5) · Little (GT4/GTPSP)

Header

Size: 0x10

Field Offset Type Description
RT04 0x00 Int Magic, (Enforced, cannot be different)
Relocation Pointer 0x04 Int Relocation Pointer
Empty 0x08 Int N/A
Page Count 0x0C Int Number of pages (categories) in the RText

Page

Size: 0x10

Field Offset Type Description
Page Name Pointer 0x00 Int String Offset to Name (Zero-terminated)
Pair Count 0x04 Int Number of pairs in this category
Pairs Pointer 0x08 Pair* Offset to the pairs
Padding 0x0C Int Padding 5E 5E 5E 5E

Pair

Size: 0x10

Field Offset Type Description
ID 0x00 UInt ID
Label String Pointer 0x04 char* Offset to the key's label (Zero-terminated)
Value String Pointer 0x08 char* Offset to the key's value (Zero-terminated)

RT03 (RTextV3)

Applies to GT4 · Little (GT4/GTPSP)

RTextV3 did not have pair IDs.

Header

Size: 0x10

Field Offset Type Description
RT03 0x00 Int Magic, (Enforced, cannot be different)
Relocation Pointer 0x04 Int Relocation Pointer
Empty 0x08 Int N/A
Page Count 0x0C Int Number of pages (categories) in the RText

Page

Size: 0x10

Field Offset Type Description
Page Name Pointer 0x00 Int String Offset to Name (Zero-terminated)
Pair Count 0x04 Int Number of pairs in this category
Pairs Pointer 0x08 Pair* Offset to the pairs
Padding 0x0C Int Padding 5E 5E 5E 5E

Pair

Size: 0x08

Field Offset Type Description
Label String Pointer 0x00 char* Offset to the key's label (Zero-terminated)
Value String Pointer 0x04 char* Offset to the key's value (Zero-terminated)

Notes

All games after GT4 have backwards compatibility with RTextV3 and RTextV4. Endianess will depend of the current platform.

The string table must be properly ordered alphanumerically as the game uses binary searching.

String/Data alignment is 0x04.

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