About Fallout: F.I.S.S.I.O.N.

Flexible Isometric Simulation System for Interactive Open‑world Nuclear‑roleplaying

Fallout: F.I.S.S.I.O.N. is a modern, cross‑platform reimplementation of Fallout 1 & 2 (Fallout2-CE) that preserves the original isometric, turn‑based gameplay while adding modding enhancements, widescreen support, and true community‑driven extensibility. Run it on Windows, Linux, macOS, Android, iOS—and even in browsers.

Powered by the F.I.S.S.I.O.N. Engine Flexible. Isometric. Simulation. System. Interactive. Open‑world. Nuclear‑roleplay. Split from the past, Powering the future

Key Features

  • Authentic isometric, turn‑based experience (SPECIAL, original Fallout gameplay)
  • True cross‑platform support: Windows, macOS, Linux, iOS, Android, Web
  • Widescreen & high‑res scaling with pixel‑perfect aspect preservation
  • Modular, customizable systems—community mods plug in seamlessly (working now)
  • 100% compatible with original Fallout 1 & 2 assets (can’t run Fallout 1 yet… one day)
  • Future‑proof: easily extended for new content and Fallout 2 integration (working now)

F.I.S.S.I.O.N. Breakdown

╔═══════════════════════╦════════════════════════════════════════════╗
║      ATTRIBUTE        ║               DESCRIPTION                  ║
╠═══════════════════════╬════════════════════════════════════════════╣
║ F – Flexible          ║ Adaptable, moddable, and future‑ready      ║
║ I – Isometric         ║ Faithful to classic 2D grid perspective    ║
║ S – Simulation        ║ Manages AI, world rules, stats, turn timing║
║ S – System            ║ Unified architecture for engine/runtime    ║
║ I – Interactive       ║ Dynamic player choices and feedback        ║
║ O – Open‑world        ║ Seamless large‑map exploration             ║
║ N – Nuclear‑roleplay  ║ Immersive post‑nuclear RPG experience      ║
╚═══════════════════════╩════════════════════════════════════════════╝

What is Fallout: FISSION

Fallout: FISSION is a modern, streamlined evolution of the Fallout 2 engine — built on the foundation of Fallout2-CE, and guided by a clear, deliberate philosophy: simplify, clarify, and preserve the original spirit of Fallout, while enabling the expansion, modification, and improvement of the Fallout world itself.

Where projects like sfall extend Fallout by enabling powerful gameplay modifications, experimental mechanics, and mod-specific opcode support, FISSION follows a different path: it extends, refines, and integrates core engine features to support modular content and narrative extendibility. The result is an engine that preserves Fallout’s core gameplay while providing a stable, maintainable foundation for expanding its world over time.

FISSION’s Core Goals

  • Simplify configuration
    No more juggling multiple INI files like ddraw.ini or f2_res.ini. All engine and graphics settings are accessible directly inside the game through an integrated preferences interface, or via the original ‘fallout2.cfg’.

  • Maintain compatibility
    Existing scripts, mods, and art assets built for vanilla Fallout 2 (and CE) still work. The vanilla game, or TCs that worked with the original .exe, work with FISSION.

  • Modernize the experience
    True widescreen support, scalable interfaces, and consistent behavior across platforms — macOS, Windows, Linux, and more. Limited improvements to modernize the experience, without undoing the original.

  • Preserve authenticity
    Every design choice respects the pacing, tone, and intent of the original Fallout titles. The focus is on preserving what made the games iconic, not rewriting them.

  • Encourage accessibility and modding
    A cleaner, easier setup means players and fans can setup, understand, and modify the engine without digging through layers of undocumented hacks, or overlapping extensions.

Why FISSION?

Fallout: FISSION isn’t just another compatibility fork — it’s a statement on how classic games should be preserved.

Instead of endlessly stacking patches and workarounds, FISSION rebuilds the Fallout 2 experience with structure, extendibility, and respect for its roots. The engine aims to extend the world of Fallout — not rewrite the gameplay itself.

  • For players: a faster, cleaner, and more reliable way to experience Fallout.
  • For modders: new possibilities beyond monolithic total conversions and fragile repacks.
  • For developers: a stable, maintainable foundation that honors the past without being chained to it.

Fallout: FISSION — clean code, clear purpose, classic Fallout.

Contributing

Contributions are welcome! Please open issues or pull requests on GitHub.

License

Released under the Sustainable Use License.