Is there some list somewhere of all the OnEvent and Action options?

In the Schema files:-

  <xs:simpleType name="OnEventTypes">
    <xs:restriction base="xs:string">
      <xs:enumeration value="OnConstructShip"/>
      <xs:enumeration value="OnConstructImprovment"/>
      <xs:enumeration value="OnPlanetTileOwnerChangeToForeign"/>
      <xs:enumeration value="OnPlanetTileOwnerChangeToSelf"/>
      <xs:enumeration value="OnGenocidePlanet"/>
      <xs:enumeration value="OnCollideAtAnomaly"/>
      <xs:enumeration value="OnArriveAtAnomaly"/>
      <xs:enumeration value="OnEventChoice"/>
      <xs:enumeration value="OnUPResolutionPassed"/>
      <xs:enumeration value="OnCultureTraitUnlock"/>
      <xs:enumeration value="OnColonizePlanet"/>
      <xs:enumeration value="OnConquerPlanet"/>
      <xs:enumeration value="OnConquerPlanetFirstTime"/>
      <xs:enumeration value="OnPlanetRebellionComplete"/>      
      <xs:enumeration value="OnHomeworldConquered"/>
      <xs:enumeration value="OnConversationResponse"/>
      <xs:enumeration value="OnTechResearched"/>
      <xs:enumeration value="OnStartTurn"/>
      <xs:enumeration value="OnObjectDestroyed"/>
      <xs:enumeration value="OnConstructShipyard"/>
      <xs:enumeration value="OnConstructStarbase"/>
      <xs:enumeration value="OnPlayerDead"/>
      <xs:enumeration value="OnTechAgeReached"/>
      <xs:enumeration value="OnCollideWithCampaignWaypoint"/>
      <xs:enumeration value="OnScreenUnhidden"/>
      <xs:enumeration value="OnInitialShips"/>
      <xs:enumeration value="OnStartMegaEvent"/>
      <xs:enumeration value="OnTurnCountSinceTrigger"/>
      <xs:enumeration value="OnFinishBattleVictory"/>
      <xs:enumeration value="OnCreateTradeRoute"/>
      <xs:enumeration value="OnConstructModule"/>
      <xs:enumeration value="OnMeetMercenary"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="ActionTypes">
    <xs:restriction base="xs:string">
      <xs:enumeration value="StatusEffect"/>
      <xs:enumeration value="RemoveStatusEffect"/>
      <xs:enumeration value="GiveObjectToTileOwner"/>
      <xs:enumeration value="KillPopulation"/>
      <xs:enumeration value="AwardModulePoints"/>
      <xs:enumeration value="AwardDominantIdeologyPoints"/>
      <xs:enumeration value="AwardFreeImprovement"/>      
      <xs:enumeration value="AwardRandomShip"/>
      <xs:enumeration value="AwardShipOfClass"/>
      <xs:enumeration value="AwardStartingShip"/>
      <xs:enumeration value="AwardShipOfClassToAllColonies"/>
      <xs:enumeration value="CompletePercentOfCurrentTech"/>
      <xs:enumeration value="AwardCommander"/>
      <xs:enumeration value="FinishCurrentTech"/>
      <xs:enumeration value="FinishNearestPlanetProject"/>
      <xs:enumeration value="Wormhole"/>
      <xs:enumeration value="BattleEncounter"/>
      <xs:enumeration value="UPResolutionRedistributeWealth"/>
      <xs:enumeration value="UPResolutionRedistributeTech"/>
      <xs:enumeration value="UPResolutionCancelAllWars"/>
      <xs:enumeration value="UPResolutionCancelAllRebellion"/>
      <xs:enumeration value="UPResolutionDefiantRaceRemoval"/>
      <xs:enumeration value="UPResolutionCancelResearch"/>
      <xs:enumeration value="ChangePlanetTileToType"/>
      <xs:enumeration value="PlayerClaimAllPlanetsInRebellion"/>
      <xs:enumeration value="PlayerClaimAllStarbasesInRebellion"/>
      <xs:enumeration value="AwardResearchAmount"/>
      <xs:enumeration value="TerraformTilesOnPlayerPlanets"/>
      <xs:enumeration value="TerraformTilesOnPlanet"/>
      <xs:enumeration value="DiscoverNearbyPlanetOfClass"/>
      <xs:enumeration value="FlipForeignPlanet"/>
      <xs:enumeration value="SpawnPlanetNearOtherFaction"/>
      <xs:enumeration value="SpawnPlanetNearUs"/>
      <xs:enumeration value="DeclarationOfWarByNeutralPlayers"/>
      <xs:enumeration value="DoActionPlayerCancelAllRebellion"/>
      <xs:enumeration value="PlayerChangeTradeRouteType"/>
      <xs:enumeration value="DestroyObject"/>
      <xs:enumeration value="PlaceWaypoint"/>
      <xs:enumeration value="EnableObjective"/>
      <xs:enumeration value="CompleteObjective"/>
      <xs:enumeration value="EnableScenarioTrigger"/>
      <xs:enumeration value="DoScenarioConversation"/>
      <xs:enumeration value="DisableUIControl"/>
      <xs:enumeration value="UnhideUIControl"/>
      <xs:enumeration value="DestroyObjectByCampaignID"/>
      <xs:enumeration value="PlaceAnomaly"/>
      <xs:enumeration value="TriggerGlobalEvent"/>
            <xs:enumeration value="TriggerMegaEvent"/>
            <xs:enumeration value="DisableMegaEvent"/>
      <xs:enumeration value="TriggerColonizationEvent"/>
      <xs:enumeration value="ShowStartingPositions"/>
      <xs:enumeration value="SpawnFaction"/>
      <xs:enumeration value="SpawnArtifact"/>
      <xs:enumeration value="AwardArtifactToWeakestPlayer"/>
      <xs:enumeration value="AwardArtifactToStrongestPlayer"/>
      <xs:enumeration value="SpawnAnomaly"/>
      <xs:enumeration value="ConvertDeadPlanet"/>
      <xs:enumeration value="ConvertDeadPlanetToThulium"/>
      <xs:enumeration value="ConvertAsteroidsToDurantium"/>
      <xs:enumeration value="ConvertGasGiantToPromethion"/>
      <xs:enumeration value="SpawnElerium"/>
      <xs:enumeration value="SpawnAntimatter"/>
      <xs:enumeration value="SpawnRelic"/>
      <xs:enumeration value="SpawnEleriumProportional"/>
      <xs:enumeration value="SpawnAntimatterProportional"/>
      <xs:enumeration value="SpawnRelicProportional"/>
      <xs:enumeration value="Assassination"/>
      <xs:enumeration value="GrantRandomTechToAll"/>
      <xs:enumeration value="ConvertDeadPlanetProportional"/>
      <xs:enumeration value="ConvertDeadPlanetToThuliumProportional"/>
      <xs:enumeration value="ConvertAsteroidsToDurantiumProportional"/>
      <xs:enumeration value="ConvertGasGiantToPromethionProportional"/>
      <xs:enumeration value="FlipNonCapitalPlanetInAreaEffect"/>
      <xs:enumeration value="UnhideScreen"/>
      <xs:enumeration value="AwardMercenaryShip"/>
            <xs:enumeration value="AwardRandomMercenaryShip"/>
    </xs:restriction>
  </xs:simpleType>

Might Also be worth looking at the Mega Events, soem of them are timed. Blah for 25 turns ect.

the onstartturn trigger only fires once (it will not fire at all if you don't specify a turn).

I'm more than a little interested in the three spawn/award artifact actions. Which schema file is that? Is it just in there with the rest of the .xml files and I didn't notice?

EDIT: sadly it appears that even SpawnArtifact doesn't have any additional criteria and just gives it to the weakest player as per the console command. The best approach I'm seeing is to create your own artifact, momentarily make yourself the weakest player, then award the artifact and revert whatever prior change you made. A clunky solution at best.

I also don't see any way to choose a specific artifact, so you would probably need to modify the default one.

Also also, the temples and such give a bonus to CulturePerTurnX (e.g. CulturePerTurnBenevolent, etc.). The fact that they have these sorts of 'workaround' stats makes me think that there isn't any real way to make something happen every turn other than artifacts and repeated use of the OnStartTurn event.

tried including the "PerTurnStats" line from ArtifactDefs.xsd inside of RaceTraitDefs.xsd just below the "Mod" definition line, but the game just silently crashes on startup.

tried with <OnEvent>OnTurnCountSinceTrigger</OnEvent>,
no luck, it seems working within a scenario.

posted unded separated cover : https://forums.stardock.com/480327

and thank you for your pointers.

c