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

Prerequisites

You must own Fallout 2 (GOG, Steam, or Epic Games version) and have it fully installed. F.I.S.S.I.O.N. is a drop-in replacement for Fallout2.exe and requires the complete game data.

Supported base installations:

  • Vanilla Fallout 2 - The classic game
  • Fallout: Nevada - Russian total conversion mod
  • Fallout: Sonora - Russian total conversion mod

Quick Installation

  1. Ensure you have a working vanilla Fallout 2 installation
  2. Download the latest F.I.S.S.I.O.N. release
  3. Extract the F.I.S.S.I.O.N. files into your Fallout 2 folder
  4. Run fallout-fission.exe (Windows) or fallout-fission.app (macOS) instead of the original executable

That’s it! F.I.S.S.I.O.N. automatically loads all existing content and adds its enhanced modding capabilities.

Platform-Specific Instructions

macOS

# Example: Using a GOG Fallout 2 installation
# 1. Right-click Fallout2.app → "Show Package Contents"
# 2. Navigate to Contents/Resources/Data/
# 3. Extract F.I.S.S.I.O.N. files here
# 4. Run fallout-fission.app

Windows (limited support)

# Example: Installing into a Steam Fallout 2 installation
# 1\. Navigate to your Fallout 2 folder (typically):
cd "C:\Program Files (x86)\Steam\steamapps\common\Fallout 2"
# 2\. Extract F.I.S.S.I.O.N. files here
# 3\. Run fallout-fission.exe

Linux (limited support)

# Example: Using a Wine Fallout 2 installation
# 1. Navigate to your Fallout 2 Wine prefix
cd ~/.wine/drive_c/Program\ Files/Fallout\ 2/
# 2. Extract F.I.S.S.I.O.N. files
# 3. Run with: wine fallout-fission.exe

Expected Folder Structure

After installation, your Fallout 2 folder should contain:

Fallout 2/
├── fallout-fission.exe       # F.I.S.S.I.O.N. executable (Windows)
├── fallout-fission.app       # F.I.S.S.I.O.N. application (macOS)
├── fission.dat               # Engine data file
├── master.dat                # Original game data
├── critter.dat               # Original game data
├── patch000.dat              # Patch data (if present)
├── data/                     # Game data folder
│   ├── proto/                # Proto files (vanilla + mods)
│   ├── text/                 # Text files (vanilla + mods)
│   ├── maps/                 # Map files
│   └── data/lists/           # Auto-generated mod reports (created on first run)

Important Notes

  • F.I.S.S.I.O.N. does NOT include game data - you must own Fallout 2

  • Your existing saves will work - F.I.S.S.I.O.N. maintains full compatibility

  • No configuration needed for basic use - just replace the executable

Configuration

Use the in-game ‘preferences’ screen for ‘graphics’ configuration.

Other configuration can be done fia the fallout2.cfg file.

For advanced tweaks, use the [sfall] sections in ‘fallout2.cfg’ (Sfall):

[sfall-misc]
WorldMapTravelMarkers=1
GaplessMusic=1
EnhancedBarter=1

Mod/Game Compatibility

Fully supported:

  • Fallout 2
  • Fallout: Nevada
  • Fallout: Sonora

Not supported yet, maybe never:

  • Fallout 1
  • Fallout Nevada or Sonora ‘repacks’
  • Restoration Project
  • Fallout: Et Tu
  • Olympus 2207
  • Resurrection, Yesterday (untested)

(For full Fallout 1 support see Fallout1-CE.)