if ( stepsDone == OnlineGame.steps.size() ) System.out.println (Thread.currentThread().getName() + ":" + "победитель!");

Ivanov:Начало игры
Petrov:Начало игры
Sidorov:Начало игры
Sidorov stepsDone = 1
Sidorov:Сбор ресурсов
Ivanov:Сбор ресурсов
Sidorov stepsDone = 2
Sidorov:Рост экономики
Sidorov stepsDone = 3
Sidorov:Убийство врагов
Ivanov:Рост экономики
Sidorov stepsDone = 4
Ivanov:проиграл
Petrov:проиграл

import java.util.ArrayList;
import java.util.List;

public class Solution {
    public static void main(String[] args) throws InterruptedException {
        OnlineGame onlineGame = new OnlineGame();
        onlineGame.start();
    }

    public static class OnlineGame extends Thread {
        public static volatile boolean isWinnerFound = false;

        public static List<String> steps = new ArrayList<String>();

        static {
            steps.add("Начало игры");
            steps.add("Сбор ресурсов");
            steps.add("Рост экономики");
            steps.add("Убийство врагов");
        }

        protected Gamer gamer1 = new Gamer("Ivanov", 3);
        protected Gamer gamer2 = new Gamer("Petrov", 1);
        protected Gamer gamer3 = new Gamer("Sidorov", 5);

        public void run() {
            gamer1.start();
            gamer2.start();
            gamer3.start();

            while (!isWinnerFound) {
            }
            gamer1.interrupt();
            gamer2.interrupt();
            gamer3.interrupt();
        }
    }

    public static class Gamer extends Thread {

		private int rating;

        public Gamer(String name, int rating) {
            super(name);
            this.rating = rating;
        }

        public void run() {
        	
        	int stepsDone = 0;
        	
        	try {
    	   		
        		for ( int i = 0; i < OnlineGame.steps.size(); i++ ) {
	        		System.out.println(getName() + ":" + OnlineGame.steps.get(i));
	        		stepsDone++;
					Thread.sleep(1000/rating);
					if ( Thread.currentThread().getName().equals("Sidorov")) System.out.println( "Sidorov stepsDone = " + stepsDone );
        		}
    	   		
				OnlineGame.isWinnerFound = true;				
    	   		
        	} catch (InterruptedException e) {
        		if ( stepsDone == OnlineGame.steps.size() ) System.out.println (Thread.currentThread().getName() + ":" + "победитель!");
        		else System.out.println(this.getName() + ":" + "проиграл");        		
			}
        }
    }
}