Here I've made sure that the 'Playable' tab is checked, and that the nation belongs to 'Team 1'. I have decided to create a small single player scenario that will sandwich the player between two warring states. These will let you tailor choose which nation you want to add, their policies, their starting relationship to other players on the map and even the technologies they start with. Hitting the small plus sign will add a nation to your scenario, and open up a series of options in the centre of the screen. At the bottom left of this window there's a blank box with a 'Players' tab at the top. This will let you set the general parameters of the game, including the speed of the game, the starting date and win conditions. Look to the top of the screen and select the 'Scenario Editor' tab. There's no war, or death, or squabbling politicians to trouble your idyllic new Eden. It's a quiet and peaceful place that belongs to nature alone. The attached drop down menu will let you place special tiles such as encampments, ancient ruins and ready made mines in the world. To add ruins for players to discover, head to the 'Plopper' tab and select the 'Improvements' pip. Click on the dots and link them up to add bubbling brooks into your world. Clicking this will turn your map into a horrible mess of blue dots. If you want to add rivers, go to the 'River' tab. Now simply paint your map into existence in the main view. In the drop down menu below 'Terrain' you'll be able to select anything from grassland to mountains. First, set the size and shape of your brush with the top two options, and then make sure the 'Terrain' pip is checked in the list of options below. The fastest way to create your world is using the 'paint' tab. At the top right you'll notice a series of tabs under the heading 'Map Editor Tools'. You can raise mountains, throw down jungles and sew rivers into the terrain by simply painting tiles onto the ocean. The first thing we need to do now is create some terrain. On this screen you'll be able to fine tune every aspect of your map.

Cities skylines map editor tips