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An open-source native PC port and launcher for Sengoku Basara 4 Sumeragi (PlayStation 4, CUSA01159) for Windows 10/11.

The game's original x86-64 code executes directly on your PC's CPU without emulation. The PlayStation 4 system libraries are re-implemented function by function in native C/C++, and GPU commands are translated to Vulkan 1.3 in real-time.

💬 Discord Community: https://discord.gg/UBZc57bBMa — Setup help, controller configs & gaming community
🎬 TikTok: @razzconnect (https://www.tiktok.com/@razzconnect) — Development progress, showcases & devlogs
☕ Support Solo Dev: https://sociabuzz.com/razzgame/tribe

No copyrighted game files are included. You must provide your own legally dumped copy of the game from your PlayStation 4 console (tested: CUSA01159).

This project is an independent open-source reverse-engineering and preservation project made by Razz. Not affiliated with, endorsed by, or associated with Capcom or Sony Interactive Entertainment. "Sengoku Basara" is a trademark of Capcom Co., Ltd. "PlayStation" is a trademark of Sony Interactive Entertainment.

• Features & Highlights
• System Requirements
• Download and Play
• Launcher Settings
• In-Game Menu & Hotkeys
• Controller Support
• How It Works (Technical Architecture)
• Building from Source
• Troubleshooting & Logs
• Credits & Acknowledgments
• Community & Socials
• License

• 100% Native CPU Execution: No CPU interpreter or JIT compiler. The game's compiled x86-64 instructions run directly on host CPU cores with near-zero overhead.
• Custom Software Ngs2 Audio Engine: Reverse-engineered and implemented software Ngs2 sound graph handling multi-channel ATRAC9 streaming, LibAtrac9 decoding, voice synthesis, PCM playback, and submixing.
• Vulkan 1.3 Graphics Translation: High-performance translation of PlayStation 4 AMD GCN shader bytecode and draw calls directly into SPIR-V / Vulkan.
• Custom Basara 4 PC Launcher: Built from scratch with a themed Sengoku aesthetic, resolution picker, display modes, anisotropic filtering, FSR 1 upscaling, and controller configuration.
• True Unlimited FPS Unlock: Integrated memory patch (basara4_patches.py) that scans for the engine's internal frame limiter and disables it, unlocking 90, 120, 144, 165, 240, and uncapped FPS on high-refresh displays.
• AMD FidelityFX Super Resolution (FSR 1) & RCAS Sharpening: Upscale cleanly from 720p/900p/1080p to 1440p or 4K.
• Anisotropic Filtering (up to 16x): Greatly enhances floor and terrain texture clarity across battlefields.
• Dynamic Asset & Import Preparation: Automatic game image preparation pipeline (prepare.py, link_libc.py, link_modules.py, content_profile.py) that adapts to official patches without touching your original dump.
• Universal Gamepad Mapper: Bundled SDL3 mapper tool (basara4-pad-mapper.exe) for DirectInput, generic USB gamepads, and Xbox/PlayStation controllers.

Download the latest basara4-windows.zip from the Releases page and extract it to a directory of your choice (e.g. C:\Games\basara4-windows).

Place your decrypted PS4 game dump folder (which contains eboot.bin, sce_module\, and sce_sys\) into the game\ directory, or click Browse in the launcher to select its location.

1. Double-click Sengoku Basara 4.exe.
2. Select your desired resolution, display mode, and frame limit.
3. Click PLAY.
   • Note: The very first launch will automatically prepare the linked binary image into out\ (takes roughly 30–60 seconds). Subsequent boots start immediately.
4. To launch directly with your last saved settings without opening the launcher GUI, use Play Sengoku Basara 4.cmd.

• Insert (Keyboard) or R3 + L2 (Gamepad): Opens the in-game overlay menu (FSR settings, Anisotropic filtering, controller indicators, and About).
• F12: Captures a screenshot to user\.
• L1 / R1 (or Q / E): Switches tabs in the overlay menu.

• Native XInput & SDL3: Xbox One / Series, DualShock 4, DualSense, and Nintendo Switch Pro controllers are recognized automatically.
• Generic / DirectInput Gamepads: Click Map controller in the launcher to calibrate button and stick axes using basara4-pad-mapper.exe. Mapping values are saved to user\gamepad_mapping.txt.

[ PS4 eboot.bin (x86-64 ELF) ]
              │
              ▼  (Direct Execution on Host CPU)
      Host CPU (x86-64)
              │
    ┌─────────┴─────────────────────────────────┐
    │                                           │
    ▼ (System Calls / Libs)                     ▼ (GPU / Draw Calls)
[ C System HLE Runtime ]             [ Vulkan 1.3 Translation Core ]
- runtime_offline.c (~130 contracts) - GCN bytecode -> SPIR-V
- Kernel Events, Threads, Sockets    - FSR 1 / RCAS / Anisotropy
- Software Ngs2 (ATRAC9, PCM)        - Vulkan Memory Allocator
- LibAtrac9 Decoder (Hardened)                  │
    │                                           ▼
    ▼                                      Host GPU (Vulkan)
AudioOut / DirectSound / WASAPI

1. Native CPU Execution: Unlike traditional console emulators (e.g. RPCS3), no CPU translation layer is required. Both the PS4 and modern PCs share the AMD64 (x86-64) architecture.
2. Reverse-Engineered System Contracts (src/runtime_offline.c): Capcom's MT Framework engine for Basara 4 relies on ~130 PlayStation 4 OS functions not found in base SpartanPort. These were reverse-engineered and implemented natively, including:
   • Kernel event flags and multi-thread sync primitives.
   • Offline AppContent / PlayGo container virtualisation.
   • Offline NetCtl / NP / HTTP stubs to satisfy network checks.
   • Message dialog and screenshot service bridges.
3. Software Ngs2 Sound Graph (src/runtime_audio.c): Basara 4 routes all background music, dialogue, and combat SFX through Sony's proprietary Ngs2 library. This project implements a software Ngs2 graph featuring voice samplers, loop point handling, pitch scaling, ring buffer streaming, and multi-channel master buses.
4. Hardened LibAtrac9 Decoder: Incorporates security and boundary hardening within third_party/LibAtrac9 (huffCodes.c, unpack.c, band_extension.c) to gracefully handle edge-case stream corruptions without crashing.
5. On-the-Fly Memory Patching (launcher/basara4_patches.py): Locates the game's internal frame throttle instructions via byte pattern matching and removes the cap before execution begins.

1. MSYS2 with the CLANG64 environment installed:

   pacman -S --needed base-devel mingw-w64-clang-x86_64-toolchain \
       mingw-w64-clang-x86_64-cmake mingw-w64-clang-x86_64-ninja \
       mingw-w64-clang-x86_64-vulkan-headers mingw-w64-clang-x86_64-vulkan-loader \
       mingw-w64-clang-x86_64-sdl3 mingw-w64-clang-x86_64-ffmpeg \
       mingw-w64-clang-x86_64-glslang mingw-w64-clang-x86_64-pkg-config

2. Python 3.10+ (Windows host installation) with PyInstaller and Pillow:

   python -m pip install pyinstaller pillow

1. Clone the repository recursively:

   git clone --recursive https://github.com/razzconnect/basara4-native-pc.git
   cd basara4-pc

2. Open the MSYS2 CLANG64 terminal and build the native runtime:

   bash build.sh

   This compiles out/gpu/basara4-core.exe.

3. In PowerShell, assemble the distribution package:

   python packaging/basara4/make_package.py --out dist/basara4-windows

To update an existing release folder without disturbing your game\, user\, or out\ cache:

python packaging/basara4/make_package.py --out G:/basara4-windows --update

When reporting issues or bugs, please attach the relevant logs from the user\ folder:

• user\last_run.log: Core runtime diagnostic log (initialization, GPU shader compiling, crash traceback).
• user\prepare.log: Output from the image preparation and relocation stage.
• user\audio_debug.log: Detailed Ngs2 voice allocations, streaming feeds, and buffer status (enable "Audio debug log" in launcher).

To summarize audio logs from command line:

python tools/audio_log_summary.py user/audio_debug.log

This project is built upon open-source foundations and prior reverse-engineering efforts:

Full upstream notices, legal attributions, and copyright declarations are documented in NOTICE.md.

Join our community for discussions, troubleshooting, updates, and more:

• Discord Community: https://discord.gg/UBZc57bBMa (general community & gaming)
• TikTok: @razzconnect (https://www.tiktok.com/@razzconnect) — development progress & updates

This project is licensed under the GNU General Public License v2.0 or later (LICENSE).

• All modifications, reverse-engineered engine contracts, custom audio graph code, and launcher source code created by Razz are Copyright (C) 2026 Razz under GPL-2.0-or-later.
• Third-party components and submodules retain their respective authors' licenses as described in NOTICE.md and third_party/.