Game (Logo w/link to Wikipedia page, preferably.)

Engine (Perhaps too technical; save for DevMaster's 3D Engines Database? Not tabled though...reformat their data and pull into this table?)

Player character

Level/world design

Weapons

NPCs (Merge with "Player character" and rename "Characters"?)

Inventory (Rename to "Interface" and include things like HUD, save/load system, controls configuration, etc?)

Other