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+# Project Structure Guide
+
+## CPP Structure
+
+All C++ files are in the OpenVic2/extension/ directory
+
+Please see the [C++ Styleguide](./styleguide-cpp.md) for more details
+
+## Godot Structure
+
+All godot files are in the OpenVic2/game directory
+
+### Definitions
+
+* root/, res/, r/ -> The root directory of the Godot project (OpenVic2/game/)
+* user/, u/ -> The user directory used by the project (Platform specific)
+* core -> related to the functionality of OpenVic2 without modification
+
+> Windows u/ -> %APPDATA%/OpenVic2/
+>
+> MacOS u/ -> ~/Library/Application Support/OpenVic2/
+>
+> Linux u/ -> ~/.OpenVic2/
+
+### When to use root/
+
+Any files that are integral to the basic functionality of the project, with the condition
+that these files are immutable. The application should only ever read from these files.
+
+#### Examples
+
+* Core art assets - good icons, 3D models etc.
+* Core sound assets - soundtrack, sfx etc.
+* Core simulation files - goods, pops etc.
+* Core map files - terrain, provinces etc.
+
+#### Rule of thumb
+
+Files that are not modified by the running application should be in root/
+
+### When to use user/
+
+* Any file that has a mutable state within the game needs to be stored in user/ to avoid
+permissions issues. I.e. if the application writes to these files in any capacity
+* Any overloaded data through the use of mods should be stored in user/ to maintain project integrity.
+* Game cache data should be written to user/
+* Files generated at runtime by the application need to be stored in user/ to avoid permission issues.
+
+#### Rule of thumb
+
+Files that are modified by the running application should be in user/
+
+### Scene, Scripts, and Resources Organization
+
+No scene files should be in the root/src/ directory
+
+Resources, scripts etc. that are used universally across the application should have a distinct subdirectory
+within root/src/
+
+Scene files should be stored in subdirectories of root/src/ organized by the relevancy to each other
+
+Complex Scenes that make use of a top level management system should use further subdirectories
+to organize their structure
+
+Resources, scenes, scripts etc. used exclusively within that scene should be stored in the scenes subdirectory
+
+Example:
+```
+root/
+|- src/
+    |- Theme/
+    |   |- ButtonNormal.tres
+    |   |- ButtonHover.tres
+    |   |- ButtonDisabled.tres
+    |- Scripts/
+    |   |- Math.gd
+    |- Menu/
+    |   |- MenuManager.tscn
+    |   |- MenuManager.gd
+    |   |- MainMenu/
+    |   |   |- MainMenu.tscn
+    |   |   |- MainMenu.gd
+    |   |   |- MainMenuFont.ttf
+    |   |   |- MainMenuLabel.tres
+    |   |- SettingsMenu/
+    |   |   |- Settings.tscn
+    |   |   |- Settings.gd
+    |   |   |- Resolution/
+    |   |   |   |- ResolutionSelector.gd
+    |   |   |- Volume/
+    |   |   |   |- VolumeGrid.tscn
+    |   |   |   |- VolumeGrid.gd
+```