Here is a list of all namespaces with brief descriptions:

[detail level 12345]

►NBulletXNA
NBulletCollision
NLinearMath
NDShowNET
►NEntities
NBlocks
NHavok
►NKeenSoftwareHouse
►NLibrary
NExtensions
NIO
NLitJson
►NMedieval
NAI
NDefinitions
►NObjectBuilders
NDefinitions
►NMinerWars
►NAppCode
►NGame
NTrailer
NMultiplayer
►NObjectBuilders
►NDefinitions
NGUI
NParallelTasks
►NProtoBuf
NMeta
NSerializers
►NSandbox
NAI
►NAppCode
►NGame
NSessions
NTransparentGeometry
►NCommon
►NObjectBuilders
NDefinitions
►NCommonLib
NObjectBuilders
►NDefinitions
NGUI
►NEngine
NAI
NAudio
NModels
NMultiplayer
NNetworking
NPhysics
►NPlatform
NVideoMode
NUtils
►NVoxels
NPlanet
NStorage
►NGame
►NAI
NActions
NBehaviorTree
NCommands
NLogic
NNavigation
NPathfinding
NAudio
NComponents
NDebugging
NDefinitions
►NEntities
NBlocks
►NCharacter
NComponents
►NCube
NCubeBuilder
NDebris
NEnvironmentItems
NInterfaces
NInventory
NPlanet
NUseObject
►NEntityComponents
NRenders
NSystems
►NGameSystems
NContextHandling
NConveyors
NCoordinateSystem
NElectricity
NStructuralIntegrity
►NGui
NDebugInputComponents
►NGUI
►NDebugInputComponents
NHonzaDebugInputComponent
NHudViewers
NLights
NLocalization
NMultiplayer
NParticleEffects
►NReplication
NHistory
NStateGroups
►NScreens
NDebugScreens
NHelpers
►NTerminal
NControls
NTriggers
►NSessionComponents
NClipboard
NUtils
NVoiceChat
►NWeapons
►NGuns
NBarrels
►NWorld
NGenerator
NTriggers
►NWorldEnvironment
N__helper_namespace
NDefinitions
NModules
NObjectBuilders
►NGraphics
NGUI
►NGui
NDirectoryBrowser
NRichTextLabel
►NModAPI
NIngame
►NInterfaces
NTerminal
NPhysics
NWeapons
►NObjectBuilders
NDefinitions
►NSpaceEngineers
NAI
NDefinitions
►NGame
NAchievements
NAI
NDefinitions
►NEntities
NBlocks
NCube
NUseObjects
NWeapons
►NEntityComponents
NDebugRenders
NRenders
NGui
NGUI
►NModAPI
NIngame
NSessionComponents
NVoiceChat
►NWeapons
►NGuns
NBarrels
►NWorld
NEnvironment
NGenerator
►NObjectBuilders
NDefinitions
►NSpaceEngineersDedicated
NProperties
NSpaceStatEffect
►NSystem
►NCollections
NGeneric
NIO
►NLinq
NExpressions
NNet
NReflection
►NRuntime
NCompilerServices
NText
NUnsharper
►NValve
NInterop
NVR
►NVRage
NAlgorithms
►NAudio
NX3DAudio
NBitCompression
NCollections
►NCommon
►NNoise
NModifiers
NUtils
NCompiler
NCompression
NCryptography
►NData
NAudio
►NDedicated
NConfigurator
NExtensions
►NFilesystem
NFindFilesRegEx
NFileSystem
►NGame
NAI
NCommon
►NComponents
NInterfaces
NSession
NCore
►NDefinitions
NAnimation
NSessionComponents
►NEntity
NEntityComponents
NUseObject
NExtensions
►NGUI
NTextPanel
NGui
NLocalization
►NModAPI
NIngame
NInterfaces
NModels
NNews
NObjectBuilder
►NObjectBuilders
►NAI
NBot
NEvents
NCampaign
NComponents
NComponentSystem
►NDefinitions
NGUI
NSessionComponents
NGui
NVisualScripting
NSessionComponents
NSystems
NUtils
►NVisualScripting
NCampaign
NMissions
►NScriptBuilder
NNodes
NUtils
►NGenerics
NStateMachine
NGroups
NImport
NInput
►NLibrary
NAlgorithms
►NCollections
N__helper_namespace
NReflection
NUtils
NModAPI
NNative
NNetwork
►NNoise
NCombiners
NModels
NModifiers
NPatterns
►NObjectBuilders
NDefinitions
NOpenVRWrapper
NParallelization
NPlugins
NProfiler
NReflection
►NRender11
NCommon
►NGeometryStage
NMaterials
►NGeometryStage2
NCommon
NCulling
NInstancing
NModel
NRendering
►NLightingStage
►NShadows
NInternal
NPostprocessStage
►NProfiler
NInternal
►NRenderContext
NInternal
►NResources
NBuffers
NInternal
NTextures
NShader
NTools
NReplication
NRpc
►NScripting
NAnalyzers
NRewriters
NSecurity
NSerialization
NService
NStats
NSync
NTrace
NUtils
NVoxels
NWin32
►NVRageMath
NPackedVector
NSpatial
►NVRageRender
NAnimations
NEffects
NExternalApp
NFractures
NImport
NLights
NMessages
NModels
NProfiler
NResources
NTextures
NUtils
NVertex
NVoxels
NWorld