PROJECT OT v0.5.0-rc.1 First Release Candidate 11/11 TWIN STICK DAY!

PROJECT OT v0.5.0-rc.1

Virtual-On: Oratorio Tangram Experience

After months of development, PROJECT OT reaches its first Release Candidate!

The goal has always been straightforward: preserve the original SEGA NAOMI Virtual-On: Oratorio Tangram M.S.B.S. Ver. 5.66 experience while making it more accessible on modern Windows hardware.

Built around our customized Flycast Lean runtime, PROJECT OT brings together modern controllers, expanded widescreen rendering, linked multiplayer and a dedicated player experience without changing the original arcade gameplay.

This is our first RC. There's still work ahead, but the foundation is here.

What's Included

Original NAOMI 5.66 Experience

• Original arcade gameplay, movement, combat and mechanics.
• Dedicated Flycast Lean runtime with targeted rendering and execution improvements.

Solo & Multiplayer

• Solo gameplay.
• Local VS: Two players on one Windows PC.
• Single Display and Dual Display VS configurations.
• LAN VS: Two Windows PCs over a local network.
• Match Board and Direct Connect options.

Modern Controller Support

• Xbox and compatible XInput gamepads.
• PlayStation controllers through compatible XInput configurations.
• Twin-Stick profiles including HORI, Tanita, custom configurations and supported adapters.
• Player assignment, button mapping, calibration and input testing.

Modern Display Support

• Original 4:3 presentation.
• 16:9 widescreen.
• 21:9 ultrawide.
• 32:9 super ultrawide.
• Hor+ rendering corrections for expanded horizontal visibility.
• Rendering quality options from 480p through 4K.

PROJECT OT Experience

• Custom Title, Pause and Settings menus.
• Controller, Display, Audio and Gameplay configuration.
• Arcade Cabinet Mode.
• F6 aspect-ratio switching in supported Solo sessions.
• F7 Display Information and F8 FPS.
• F12 Feedback & Diagnostics with local report export.

Getting Started

Requirements

• Windows x64 PC.
• Microsoft .NET 10 Runtime x64.
• Microsoft Visual C++ Redistributable x64.
• Compatible gamepad or Twin-Stick controller.
• Your legally obtained NAOMI 5.66 game and BIOS files.

Installation

1. Download the Windows x64 release ZIP.
2. Extract the complete package into a new local folder.
3. Place your compatible vonot.zip and naomi.zip in the root data folder.
4. Launch ProjectOT.exe.
5. Configure your controller and display, then select your game mode.

Game ROMs and BIOS files are not included.

For detailed setup instructions, see the [Getting Started Guide](https://github.com/hyp36rmax/project-ot/blob/main/docs/getting-started.md).

Release Candidate Notes

This is an early public-testing candidate, not the final release.

Some hardware combinations, display configurations and network environments still require additional validation.

LAN VS reliability is still being evaluated, including an intermittent NETWORK ERROR / 0xB002. Internet NETPLAY VS is not included.

Additional testing and refinements will continue through future releases. Gameplay-triggered rumble and other planned enhancements are not part of this RC.

See [Known Issues](https://github.com/hyp36rmax/project-ot/blob/main/docs/known-issues.md) for more information.

Feedback & Diagnostics

Found something that isn't working as expected?

Press F12 within PROJECT OT to open Feedback & Diagnostics. Export your report locally and share the relevant details when reporting an issue.

Feedback from actual players and hardware setups will help guide future improvements.

Credits

PROJECT OT builds upon [Flycast](https://github.com/flyinghead/flycast) and the work of its contributors.

Special thanks to the Virtual-On community and everyone helping preserve the original arcade experience.

PROJECT OT is an unofficial fan-created experience and is not affiliated with or endorsed by SEGA.

All original game content and trademarks belong to their respective owners.

Preserve the game. Improve the experience.

— hyp36rmax