4. Sound and Music
4.1. Goals, style, format
4.2. Sound effects
4.2.1 GUI
4.2.2.Special effects
4.2.3.Environment
4.3.
Music
4.3.1. Events
4.3.2. System screens
4.3.3. Level theme
4.3.4. Situations
4.3.5. Cinematic soundtrack
5. Story
5.1 Backstory and world
5.2. Character descriptions
5.3. Game text, dialog requirements
5.4. Sample scripts
6. Level Requirements
6.1. Level Diagrams
6.1.1. Flow diagrams
6.2. Asset revelation schedule
1. Game Mechanics
1.1. Core Gameplay
1.2. Game Flow
1.3. Characters/Units
1.4. Gameplay Elements
1.5. Game Physics
1.6. Statistics
1.7. AI
1.8. Multiplayer
2. User Interface
2.1. Flow chart
2.2. Functional Requirements
2.3. Mock-up
2.4. Buttons, icons, pointers
3. Art and Video
3.1. Goals, style, mood
3.2. 2D art and animation
3.2.1. GUI
3.2.2. Special Effects
3.3. 3D art and animation
3.4. Cinematics