This should be a complete list of the various Events.XX that you can hook into. Wanted a list for myself, figured others might be interested as well.
AppInitComplete
CameraViewChanged
CameraProjectionChanged
AnimationSamplingChanged
DontRecordCommandStreams
RecordCommandStreams
CityHandleCreated
UnitHandleCreated
UnitTypeChanged
WonderTypeChanged
WonderStateChanged
WonderTogglePlacement
ToggleDisplayUnits
GlobalUnitScale
LandmarkLibrarySwap
UnitLibrarySwap
BuildingLibrarySwap
SequenceGameInitComplete
StateMachineDumpStates
StateMachineRequestStates
StrategicViewStateChanged
SerialEventHexSelected
SerialEventHexDeSelected
SerialEventMouseOverHex
SerialEventTest
SerialEventTestAnimations
SerialEventStartGame
SerialEventCameraBack
SerialEventCameraStartMovingBack
SerialEventCameraStopMovingBack
SerialEventCameraForward
SerialEventCameraStartMovingForward
SerialEventCameraStopMovingForward
SerialEventCameraLeft
SerialEventCameraStartMovingLeft
SerialEventCameraStopMovingLeft
SerialEventCameraRight
SerialEventCameraStartMovingRight
SerialEventCameraStopMovingRight
CameraStartRotatingCW
CameraStopRotatingCW
CameraStartRotatingCCW
CameraStopRotatingCCW
CameraStartPitchingUp
CameraStopPitchingUp
CameraStartPitchingDown
CameraStopPitchingDown
SerialEventCameraIn
SerialEventCameraOut
SerialEventCameraSetCenterAndZoom
SerialEventScreenShot
SerialEventHexGridOn
SerialEventHexGridOff
SerialEventHexHighlight
SerialEventHexCultureChanged
ClearHexHighlights
ClearHexHighlightStyle
SerialEventTerrainOverlayMod
SerialEventTerrainDecalCreated
SerialEventEraChanged
SerialEventCityCreated
CityRuinsCreated
SerialEventCityCaptured
SerialEventCityDestroyed
SerialEventCityCultureChanged
SerialEventCityPopulationChanged
SerialEventCitySetDamage
SerialEventEnterCityScreen
SerialEventExitCityScreen
SerialEventBuildingSizeChanged
EventOpenOptionsScreen
SerialEventCityContinentChanged
SerialEventRoadCreated
SerialEventRoadDestroyed
SerialEventFeatureCreated
SerialEventFeatureDestroyed
SerialEventRawResourceCreated
SerialEventRawResourceDestroyed
SerialEventRawResourceIconCreated
SerialEventRawResourceIconDestroyed
SerialEventImprovementCreated
SerialEventImprovementDestroyed
SerialEventImprovementIconCreated
SerialEventImprovementIconDestroyed
SerialEventForestCreated
SerialEventForestRemoved
SerialEventJungleCreated
SerialEventJungleRemoved
SerialEventUnitCreated
SerialEventUnitDestroyed
UnitVisibilityChanged
UnitHexHighlight
SerialEventUnitSetDamage
UnitActionChanged
UnitEmbark
UnitGarrison
UnitShouldDimFlag
UnitMarkThreatening
SerialEventUnitMoveToHexes
SerialEventUnitMove
SerialEventUnitTeleportedToHex
SerialEventUnitFacingChanged
UnitSelectionChanged
UnitSelectionCleared
UnitFlagUpdated
UnitDataEdited
UnitDataRequested
UnitDebugFSM
GameOptionsChanged
GraphicsOptionsChanged
SerialEventLeaderToggleDebugCam
SerialEventUnitFlagSelected
SerialEventGameMessagePopup
SerialEventGameMessagePopupShown
SerialEventGameMessagePopupProcessed
SerialEventDawnOfManShow
SerialEventDawnOfManHide
HexFOWStateChanged
GameplayAlertMessage
InterfaceModeChanged
HexYieldMightHaveChanged
ExitToMainMenu
NotificationAdded
NotificationRemoved
NotificationActivated
ActivePlayerTurnStart
ActivePlayerTurnEnd
RemotePlayerTurnEnd
TechAcquired
PlayerChoseToLoadGame
PlayerChoseToLoadMap
UIPathFinderUpdate
DisplayMovementIndicator
NotifyAILeaderInGame
AILeaderMessage
TeamMet
WarStateChanged
SerialEventCityScreenDirty
SerialEventCityInfoDirty
SerialEventCityHexHighlightDirty
EventPoliciesDirty
SerialEventInfoPaneDirty
SerialEventUnitInfoDirty
SerialEventGameDataDirty
SerialEventTurnTimerDirty
SerialEventResearchDirty
SerialEventEndTurnDirty
SerialEventScoreDirty
SpecificCityInfoDirty
ClearDiplomacyTradeTable
ShowMovementRange
ShowAttackTargets
SpawnArrowEvent
RemoveAllArrowsEvent
AdvisorDisplayShow
AdvisorDisplayHide
EndGameShow
TaskListUpdate
EndTurnTimerUpdate
AddPopupTextEvent
MultiplayerConnectionComplete
MultiplayerConnectionFailed
MultiplayerJoinRoomAttempt
MultiplayerJoinRoomComplete
MultiplayerJoinRoomFailed
MultiplayerGameLaunched
MultiplayerProfileDisconnected
MultiplayerProfileFailed
MultiplayerGameListClear
MultiplayerGameListUpdated
MultiplayerGameListComplete
MultiplayerGamePlayerUpdated
MultiplayerGameAbandoned
ConnectedToNetworkHost
PreGameDirty
MultiplayerGamePlayerDisconnected
SearchForPediaEntry GoToPediaHomePage
GameplaySetActivePlayer
GameMessageChat
OpenPlayerDealScreenEvent
OpenInfoCorner
NaturalWonderRevealed
GameplayFX
UnitMoveQueueChanged
FrontEndPopup
GenericWorldAnchor
LoadScreenClose
InitCityRangeStrike
LocalMachineUnitPositionChanged
LocalMachineAppUpdate
UnitStateChangeDetected
UnitHexHighlight
AudioDebugChangeMusic
AudioVolumeChanged
ParticleEffectReloadRequested
ParticleEffectStatsRequested
ParticleEffectStatsResponse
KeyUpEvent
ToolTipEvent
VisibilityUpdated
UnitMemberOverlayAdd
UnitMemberOverlayRemove
UnitMemberOverlayShowHide
UnitMemberOverlayMessage
UnitMemberOverlayTargetColor
UnitMemberPositionChanged
UnitMemberCombatTargetChanged
UnitMemberCombatStateChanged
ClearUnitMoveHexRange
StartUnitMoveHexRange
AddUnitMoveHexRangeHex
EndUnitMoveHexRange
AudioPlay2DSound
RequestYieldDisplay
ShowHexYield
LanguageChanging
ModDownloadStarted
ModDownloadComplete
InstalledModsUpdated
BeforeModsActivate
AfterModsActivate
BeforeModsDeactivate
AfterModsDeactivate
MinimapClickedEvent
MinimapTextureBroadcastEvent
RunCombatSim
EndCombatSim
DragCamera
SystemUpdateUI
WorldMouseOver
UserRequestClose
LeavingLeaderViewMode
Bh
AppInitComplete
CameraViewChanged
CameraProjectionChanged
AnimationSamplingChanged
DontRecordCommandStreams
RecordCommandStreams
CityHandleCreated
UnitHandleCreated
UnitTypeChanged
WonderTypeChanged
WonderStateChanged
WonderTogglePlacement
ToggleDisplayUnits
GlobalUnitScale
LandmarkLibrarySwap
UnitLibrarySwap
BuildingLibrarySwap
SequenceGameInitComplete
StateMachineDumpStates
StateMachineRequestStates
StrategicViewStateChanged
SerialEventHexSelected
SerialEventHexDeSelected
SerialEventMouseOverHex
SerialEventTest
SerialEventTestAnimations
SerialEventStartGame
SerialEventCameraBack
SerialEventCameraStartMovingBack
SerialEventCameraStopMovingBack
SerialEventCameraForward
SerialEventCameraStartMovingForward
SerialEventCameraStopMovingForward
SerialEventCameraLeft
SerialEventCameraStartMovingLeft
SerialEventCameraStopMovingLeft
SerialEventCameraRight
SerialEventCameraStartMovingRight
SerialEventCameraStopMovingRight
CameraStartRotatingCW
CameraStopRotatingCW
CameraStartRotatingCCW
CameraStopRotatingCCW
CameraStartPitchingUp
CameraStopPitchingUp
CameraStartPitchingDown
CameraStopPitchingDown
SerialEventCameraIn
SerialEventCameraOut
SerialEventCameraSetCenterAndZoom
SerialEventScreenShot
SerialEventHexGridOn
SerialEventHexGridOff
SerialEventHexHighlight
SerialEventHexCultureChanged
ClearHexHighlights
ClearHexHighlightStyle
SerialEventTerrainOverlayMod
SerialEventTerrainDecalCreated
SerialEventEraChanged
SerialEventCityCreated
CityRuinsCreated
SerialEventCityCaptured
SerialEventCityDestroyed
SerialEventCityCultureChanged
SerialEventCityPopulationChanged
SerialEventCitySetDamage
SerialEventEnterCityScreen
SerialEventExitCityScreen
SerialEventBuildingSizeChanged
EventOpenOptionsScreen
SerialEventCityContinentChanged
SerialEventRoadCreated
SerialEventRoadDestroyed
SerialEventFeatureCreated
SerialEventFeatureDestroyed
SerialEventRawResourceCreated
SerialEventRawResourceDestroyed
SerialEventRawResourceIconCreated
SerialEventRawResourceIconDestroyed
SerialEventImprovementCreated
SerialEventImprovementDestroyed
SerialEventImprovementIconCreated
SerialEventImprovementIconDestroyed
SerialEventForestCreated
SerialEventForestRemoved
SerialEventJungleCreated
SerialEventJungleRemoved
SerialEventUnitCreated
SerialEventUnitDestroyed
UnitVisibilityChanged
UnitHexHighlight
SerialEventUnitSetDamage
UnitActionChanged
UnitEmbark
UnitGarrison
UnitShouldDimFlag
UnitMarkThreatening
SerialEventUnitMoveToHexes
SerialEventUnitMove
SerialEventUnitTeleportedToHex
SerialEventUnitFacingChanged
UnitSelectionChanged
UnitSelectionCleared
UnitFlagUpdated
UnitDataEdited
UnitDataRequested
UnitDebugFSM
GameOptionsChanged
GraphicsOptionsChanged
SerialEventLeaderToggleDebugCam
SerialEventUnitFlagSelected
SerialEventGameMessagePopup
SerialEventGameMessagePopupShown
SerialEventGameMessagePopupProcessed
SerialEventDawnOfManShow
SerialEventDawnOfManHide
HexFOWStateChanged
GameplayAlertMessage
InterfaceModeChanged
HexYieldMightHaveChanged
ExitToMainMenu
NotificationAdded
NotificationRemoved
NotificationActivated
ActivePlayerTurnStart
ActivePlayerTurnEnd
RemotePlayerTurnEnd
TechAcquired
PlayerChoseToLoadGame
PlayerChoseToLoadMap
UIPathFinderUpdate
DisplayMovementIndicator
NotifyAILeaderInGame
AILeaderMessage
TeamMet
WarStateChanged
SerialEventCityScreenDirty
SerialEventCityInfoDirty
SerialEventCityHexHighlightDirty
EventPoliciesDirty
SerialEventInfoPaneDirty
SerialEventUnitInfoDirty
SerialEventGameDataDirty
SerialEventTurnTimerDirty
SerialEventResearchDirty
SerialEventEndTurnDirty
SerialEventScoreDirty
SpecificCityInfoDirty
ClearDiplomacyTradeTable
ShowMovementRange
ShowAttackTargets
SpawnArrowEvent
RemoveAllArrowsEvent
AdvisorDisplayShow
AdvisorDisplayHide
EndGameShow
TaskListUpdate
EndTurnTimerUpdate
AddPopupTextEvent
MultiplayerConnectionComplete
MultiplayerConnectionFailed
MultiplayerJoinRoomAttempt
MultiplayerJoinRoomComplete
MultiplayerJoinRoomFailed
MultiplayerGameLaunched
MultiplayerProfileDisconnected
MultiplayerProfileFailed
MultiplayerGameListClear
MultiplayerGameListUpdated
MultiplayerGameListComplete
MultiplayerGamePlayerUpdated
MultiplayerGameAbandoned
ConnectedToNetworkHost
PreGameDirty
MultiplayerGamePlayerDisconnected
SearchForPediaEntry GoToPediaHomePage
GameplaySetActivePlayer
GameMessageChat
OpenPlayerDealScreenEvent
OpenInfoCorner
NaturalWonderRevealed
GameplayFX
UnitMoveQueueChanged
FrontEndPopup
GenericWorldAnchor
LoadScreenClose
InitCityRangeStrike
LocalMachineUnitPositionChanged
LocalMachineAppUpdate
UnitStateChangeDetected
UnitHexHighlight
AudioDebugChangeMusic
AudioVolumeChanged
ParticleEffectReloadRequested
ParticleEffectStatsRequested
ParticleEffectStatsResponse
KeyUpEvent
ToolTipEvent
VisibilityUpdated
UnitMemberOverlayAdd
UnitMemberOverlayRemove
UnitMemberOverlayShowHide
UnitMemberOverlayMessage
UnitMemberOverlayTargetColor
UnitMemberPositionChanged
UnitMemberCombatTargetChanged
UnitMemberCombatStateChanged
ClearUnitMoveHexRange
StartUnitMoveHexRange
AddUnitMoveHexRangeHex
EndUnitMoveHexRange
AudioPlay2DSound
RequestYieldDisplay
ShowHexYield
LanguageChanging
ModDownloadStarted
ModDownloadComplete
InstalledModsUpdated
BeforeModsActivate
AfterModsActivate
BeforeModsDeactivate
AfterModsDeactivate
MinimapClickedEvent
MinimapTextureBroadcastEvent
RunCombatSim
EndCombatSim
DragCamera
SystemUpdateUI
WorldMouseOver
UserRequestClose
LeavingLeaderViewMode
Bh