- Gameplay (linear, open-ended/sandbox, etc)
- Locations
- Effects
- Atmospheric/environmental
- Breath
- Dust
- Gas
- Liquid spray
- Shards
- Smoke
- Steam
- Water
- Current
- Drops
- Ripples
- Splash
- Weather
- Clouds
- Fog
- Rain
- Snow
- Wind
- Other
- Other
- Camera shaking
- Other
- Environmental interaction
- Buttons (in Move > Push only?)
- Objects
- Break
- Close
- Drop
- Move
- Open
- Pickup
- Ride
- Shoot
- Throw
- Other
- Levers/switches (in Move > Pull only?)
- Other
- Landscaping/terrain
- General design
- Destructable environment
- Terrain deformation
- Level editor
- Damage/hazards/traps
- Puzzles
- Other
- Types
- Projectiles
- Targeting
- Other
(Rename to "Interface" and include things like HUD, save/load system, controls configuration, etc?)
- Design
- Items/objects
- Map
- Pickups