Hi Mads,
To add to Aad’s good answer: The additional Custom Missions, which are created by your fellow players, are available by clicking Download content on the main menu.
You will get a list of all custom missions written for the language you chose when you installed Extremes.
You can download these missions into your User missions folder and play them by clicking Play > Single mission.
Unlike some other games, missions can be played in any order; you do not need to complete some missions to “unlock†others.
On the Ship Simulator Extremes > Missions board, you will find many bold blue topics that are worth reading. Some explain how to post questions about specific missions, and how to search for answers.
From others, you can download documents that explain how missions work, how they are tested, and how to make your own missions.
Regards,
Marty
To play the missions installed with the game, click Campaign in the main menu.