here are three reasons why you should join:

1. It's free
2. There's a prize fund of £50k
3. Your friend's face will be a treat if you do better than them

Let's face it, winning (or at least beating your mates) is even sweeter when the game's so realistic. And ours is the most realistic fantasy football game in the world.

Why? Well, instead of picking 11 players, you get to pick 15, from which you choose your side each week. There are 10 different formations to choose from and scoring's more realistic too: there are points for saves, accurate crosses and shots on target as well as the usual goals, assists and clean sheets.

The £50k prize fund is divided into £25,000 for the winner, £10,000 for the runner-up and £3,000 for the third-placed player. We've also got £1,000 for each monthly winner and a weekly prize draw of a signed Premier League shirt.

Here's what to do to join in:

1: Go to http://www.guardian.co.uk/fantasyfootball

2: Click on 'Play Now' to go to the squad selection page. Once you've picked your players click Save Team to register - its free to enter.

3: Once you're on your team line-up page, click on Friends' Leagues and type the following in the Join a Friends' League boxes:

League Name: Vorarlberg-Liga
Password: austria

Once you've done that, you're ready to compete. So enjoy the game and good luck!