RustedGames

just by calling ORK.Game.Difficulty = your DifficultyIndex

RustedGames

And here the custom step


using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using ORKFramework;
using ORKFramework.Behaviours;

namespace ORKFramework.Events.Steps
{

[ORKEditorHelp("Change Difficulty", "Change the Game Difficulty.", "")]
[ORKEventStep(typeof(BaseEvent))]
[ORKNodeInfo("Game/Game")]
public class ChangeDifficultyStep : BaseEventStep
{

[ORKEditorHelp("Difficulty Name", "Select the difficulty that will be changed to.", "")]
[ORKEditorInfo(ORKDataType.Difficulty)]
public int difficultyID = 0;

public ChangeDifficultyStep() { }

public override void Execute(BaseEvent baseEvent)
{
ORK.Game.Difficulty = difficultyID;
baseEvent.StepFinished(this.next);
}
}
}