Community:Gates to Infinity DLC Editing Tutorial

DLC Editing Tutorial for Template:GameTitle. This can be useful for making a .cia file that doesn't include unused downloadable content (or that only includes such content), or for creating custom DLCs such as custom music or dungeons.

Note that the terminal commands used on this page were used on Linux. On other operating systems, such as Windows, minor adjustments may be required.

If using Windows, make sure file extensions are enabled.

Prerequisites

• Basic knowledge of command line tools
• A .cia file of the original DLC (named gti_dlc.cia in this tutorial)
• CTRTool (https://github.com/3DSGuy/Project_CTR/releases/tag/ctrtool-v1.2.0)
• MakeROM (https://github.com/3DSGuy/Project_CTR/releases/tag/makerom-v0.18.4)

DLC Filenames

contents.0000.00000000 contains DLC icons and general data. Must be included. contents.0001.00000001 contains the dungeon Ivy Park. contents.0002.00000002 contains the dungeon Scalchop Beach. contents.0003.00000003 contains the dungeon Pika Land. contents.0004.00000004 contains the dungeon Axe Rock. contents.0005.00000005 contains the dungeon Mount Tepid. contents.0006.00000006 contains the dungeon Treat Road. contents.0007.00000007 contains the dungeon Poké Forest. contents.0008.00000008 contains the dungeon Kecleon Bazaar. contents.0009.00000009 contains the dungeon Mt. Travail. contents.000a.0000000a contains the dungeon Skill Treasury. contents.000b.0000000b contains the dungeon Ultimate Wilds. contents.000c.0000000c contains the dungeon Strongest Trail. contents.0032.00000032 contains some unknown unused data. contents.0033.00000033 contains the [Research required] music tracks. contents.0034.00000034 contains the [Research required] music tracks. contents.0035.00000035 contains the [Research required] music tracks. contents.0036.00000036 contains the [Research required] music tracks. contents.0037.00000037 contains the [Research required] music tracks. contents.0038.00000038 contains the [Research required] music tracks. contents.0039.00000039 contains the [Research required] music tracks. contents.003a.0000003a contains the [Research required] music tracks. contents.003b.0000003b contains the [Research required] music tracks. contents.003c.0000003c contains the [Research required] music tracks. contents.003d.0000003d contains the [Research required] music tracks. contents.003e.0000003e contains the [Research required] music tracks. contents.003f.0000003f contains the unused Craggy Coast music track twice. contents.004c.0000004c contains the unused Star Cave music track twice. contents.0062.00000062 contains both versions of Vast Ice Mountain Peak. contents.0065.00000065 contains DLC item graphics.

Extracting the DLC

Run the following command to extract the Contents from the .cia to the current folder.

./ctrtool --contents=contents gti_dlc.cia

You can put the files in their own folder for convenience. The rest of this tutorial assumes the contents files are in a folder named "contents".

Rebuilding the DLC

Before continuing, you need to create a text file with the name "gtidlc_rom.rsf" and that contains the following text:

Option:
  MediaFootPadding: true
  EnableCrypt: false
SystemControlInfo:
  SaveDataSize: $(SaveSize)K

Choose which Contents files you want to include in your DLC .cia file. Note that "contents.0000.345057da" must be included. Names of the Contents files consist of four numbers/letters (the first part), followed by a dot, followed by a longer sequence of numbers and letters (the second part). When mentioning them in the MakeROM command, you need to add at the end of the filename ":0x", followed by the first part, followed by ":0x", followed by the second part. For example, "contents/contents.0000.345057da" becomes "contents/contents.0000.345057da:0x0000:0x345057da".

The following are examples of what the command might look like. You can modify the examples, or use the examples as they are if you are satisfied with what they do.

Example 1: Official DLC Only

This command makes a DLC .cia file that only contains DLC that was officially distributed.

./makerom -f cia -rsf gtidlc_rom.rsf -o gti_dlc_eu_out.cia -ckeyid 0 -major 0 -minor 1 -micro 0 -DSaveSize=0 -ignoresign -dlc -i contents/contents.0000.00000000:0x0000:0x00000000 -i contents/contents.0001.00000001:0x0001:0x00000001 -i contents/contents.0002.00000002:0x0002:0x00000002 -i contents/contents.0003.00000003:0x0003:0x00000003 -i contents/contents.0004.00000004:0x0004:0x00000004 -i contents/contents.0005.00000005:0x0005:0x00000005 -i contents/contents.0006.00000006:0x0006:0x00000006 -i contents/contents.0007.00000007:0x0007:0x00000007 -i contents/contents.0008.00000008:0x0008:0x00000008 -i contents/contents.0009.00000009:0x0009:0x00000009 -i contents/contents.000a.0000000a:0x000a:0x0000000a -i contents/contents.000b.0000000b:0x000b:0x0000000b -i contents/contents.000c.0000000c:0x000c:0x0000000c -i contents/contents.0033.00000033:0x0033:0x00000033 -i contents/contents.0034.00000034:0x0034:0x00000034 -i contents/contents.0035.00000035:0x0035:0x00000035 -i contents/contents.0036.00000036:0x0036:0x00000036 -i contents/contents.0037.00000037:0x0037:0x00000037 -i contents/contents.0038.00000038:0x0038:0x00000038 -i contents/contents.0039.00000039:0x0039:0x00000039 -i contents/contents.003a.0000003a:0x003a:0x0000003a -i contents/contents.003b.0000003b:0x003b:0x0000003b -i contents/contents.003c.0000003c:0x003c:0x0000003c -i contents/contents.003d.0000003d:0x003d:0x0000003d -i contents/contents.003e.0000003e:0x003e:0x0000003e -i contents/contents.0065.00000065:0x0065:0x00000065

Example 2: Only Unused DLC Music

This command makes a DLC .cia file that only contains the unused DLC music tracks (Craggy Coast, Star Cave, and both versions of Vast Ice Mountain Peak).

./makerom -f cia -rsf gtidlc_rom.rsf -o gti_eu_unused_music_only.cia -ckeyid 0 -major 0 -minor 1 -micro 0 -DSaveSize=0 -ignoresign -dlc -i contents/contents.0000.00000000:0x0000:0x00000000 -i contents/contents.003f.0000003f:0x003f:0x0000003f -i contents/contents.004c.0000004c:0x004c:0x0000004c -i contents/contents.0062.00000062:0x0062:0x0000000062

Running a command like the two examples above creates a new .cia file that contains DLC and can be installed through 3DS homebrew software such as FBI.

Modifying the DLC

Before rebuilding, you may want to make changes to the files.

Contents can be further extracted to see and modify the actual files, which are similar to the files in the romfs of the base game. Once the edits are made, the Contents can be rebuilt.