Radiant Silvergun EXTRA


[Download v1.0.0, 2023/06/20]
(Updated: 20 June 2024 16:43:21 UTC)

Introduction

This patch back-ports scoring modes and game systems from other versions of the game into the Saturn and ST-V versions of the game. Namely, this adds "Ikaruga Mode" from the Xbox 360 version, as well as the 2-button "overseas" mode exclusive to the ST-V version. In addition to these ported modes, there's a new Special scoring mode which combines the original scoring system and the Ikaruga scoring systems in a different manner.

Saturn version

The Saturn version always has Option+ (mostly filled with assistance options) unlocked, and adds two new options to control the new features. The settings are saved along with the other settings, so you can set and forget.

ST-V version

The ST-V version already has the overseas mode, so this patch only adds the two new scoring modes. However, this patch allows picking the overseas mode per-game, rather than based on the BIOS region. This also removes less good overseas changes, such as the removal of named boss intros.

Hold A when starting the game to use overseas mode. To choose the scoring mode, when starting the game, either hold Left/B to use Ikaruga mode, or Right/C to use Special mode.

Source code

Source code may be found at http://bitbucket.org/trap15/rsg_ex/

Patching

In addition to the below patching process information, you can build patched files directly by compiling the patch from the included source code.

Saturn version

Due to the lack of a real system for distributing CD image patches that only change files on the ISO9660 filesystem, I've had to include some tools to do it for us. You can just drag your CUE onto apply_saturn.bat, and it should apply the patch cleanly and create new files in this directory.

The patcher will create new versions of the cue and bin in the same directory as the input. If your disc image has multiple bins it will only copy and rename the first track's bin, as it is the only one that changes. The below hashes are for the patched files, which can be found inside the patcher's work directory.

There is also apply_saturn.sh for Unix users, but you'll need to rebuild the tools, so look at their source for how to build them. Other than xdelta, which uses autoconf, they are very easy tools to build, with no dependencies.

File SHA1
GAME.BIN f57a9eef44f0ae13e36a3cdce7126e6c1d28da6b
OPTION.BIN d8e288b3647943c96cff71100cfaca2e6b211954
BACK_CHK.BIN f6b9ff2b339f03f861f9ffdb451b1523f74a8cb0

ST-V version

The ST-V cartridge has an empty EPROM socket that is used for late-made changes to the game's program data. We can use this to make an easily installed EPROM that contains the patch. Place your original ROM set in a folder, ensuring that the filenames match below, and drag the folder onto apply_stv.bat to create a ROM image named RSG_EX_STV.bin that can be burned to a 27C040.

Once your ROM is burned, open up the cart. You will see an empty EPROM socket on the cart's board, as shown below.

Simply put the ROM you've burned in that socket, and close it back up. That's it!

There is also apply_stv.sh for Unix users, but you'll need to rebuild the tools, so look at their source for how to build them. Other than xdelta, which uses autoconf, they are very easy tools to build, with no dependencies.

For users of certain multi-game kits, this will also produce a file named file.13 which can be added to the Radiant Silvergun set to enable this patch.

The ROMs in your folder must be named the following:

File SHA1
RSG_EX_STV.BIN bfb161aeca4a42ba183803c88a93f9451f13faa6
file.13 cd4620554acb39dd0f12c10f71797b748f202595