System 3.x Compiler and Decompiler

This is an open-source toolchain for AliceSoft's System 3.x game engine.

The following games can be decompiled and then recompiled into an ALD file that is identical to the original:

• Rance
• Rance II
• Rance III
• Rance IV
• 鬼畜王ランス
• Rance5D
• 闘神都市
• 闘神都市II
• Dr.STOP!
• DALK
• 学園KING
• 零式
• いけないかつみ先生
• かえるにょ・ぱにょ〜ん
• 戦巫女
• アトラク＝ナクア
• 王道勇者
• AmbivalenZ
• DiaboLiQuE
• ぱすてるチャイム
• ぷろすちゅーでんとGood
• HUSHABY BABY
• 守り神様
• ママトト
• DARCROWS
• PERSIOM
• SeeIn青
• 20世紀アリス (かえるにょ国にょアリス / これDPS?)
• 夜が来る!
• 大悪司
• 超昂天使エスカレイヤー
• Only You -リ・クルス-
• 妻みぐい
• 妻みぐい2
• シェル・クレイル
• 隠れ月
• 王子さまLv1
• 王子さまLv1.5
• 俺の下であがけ
• 楽園行
• Nor
• 翡翠の眸

For older games (games with ADISK.DAT file), check out sys3c.

For newer games, check out sys4lang.

Download

Prebuilt Windows executables are available here. The 64-bit version supports Windows 10 or later. For older Windows, please use the 32-bit version.

Build from Source

First, install the required dependencies (with corresponding Debian packages in parentheses):

• meson (meson)
• libpng (libpng-dev)
• asciidoctor (asciidoctor) [optional, for generating manual pages]

Then, build the executables using Meson:

meson setup build
ninja -C build

This will create the following executables in the build directory:

• xsys35c — System 3.x compiler
• xsys35dc — System 3.x decompiler
• ald — ALD archive utility
• alk — ALK archive utility
• vsp — VSP image utility
• pms — PMS image utility
• qnt — QNT image utility

Optionally, you can install these executables on your system by running:

sudo ninja -C build install

If you want to install them to a custom directory, specify the --prefix= option when running Meson.

Basic Workflow

Here are the steps for decompiling a game, editing its source code, and recompiling it back to a scenario file. See docs/adv_language.adoc for details on the language used in the source files.

Windows

1. Copy all files in the xsys35c archive to the game directory (the directory containing .ALD files).
2. Run decompile.bat. The decompiled source files will be generated in the src directory.
3. Edit the source files in the src directory as you like.
4. Run compile.bat. The scenario files in the game directory will be updated.

Other Platforms

First, in the game directory (the directory containing .ALD files), run:

xsys35dc . --outdir=src

The decompiled source files will be generated in the src directory. Edit them as you like.

Once you've finished editing, recompile the source files back to .ALD (and .ain if applicable) using the following command:

xsys35c --project=src/xsys35c.cfg --outdir=.

Alternatively, you can use xsys35c and xsys35dc with Visual Studio Code. For more information, see vscode-system3x.

Unicode Mode

By using the "Unicode Mode" in xsys35c and xsystem35 (an open-source implementation of System 3.x), you can translate games into many languages not supported by the original System 3.x. For more details, see docs/unicode.adoc.

Command Documentation

Here are the manuals for the commands:

• docs/xsys35c.adoc
• docs/xsys35dc.adoc
• docs/ald.adoc
• docs/alk.adoc
• docs/vsp.adoc (also for pms and qnt commands)