Here is how to increase the number of planets when starting a new Default Random scenario for single player or coop. It's actually really easy to do! Note that yaml files are very picky, and having even one extra space or stray character can cause the whole thing to mess up! Be very careful when editing this document and do so at your own risk! Proper capitalization is important! First, I recommend using a good text editor like Notepad++. You can make the changes in regular notepad for this though. Go to your Empyrion - Galactic Survival/Content/RandomPresets folder. An easy way to find this folder is from within Steam. From your Games Library, right click on Empyrion, click on Properties, click on the Local Files tab, then click Browse Local Files. Make a copy of solarsystemconfig.yaml as a backup. You can always use this backup to undo your changes. Open up solarsystemconfig.yaml in Notepad++, Notepad, or another text editor of your choice. This is the file the game uses when creating a new Default Random game. Near the top of the document you should see the following: Code: SectorPlanets: - TemperateStarter,  - Snow, [0,1] # +1 used as neighbor - Desert, [1,2] # needed for resources - Barren,  - Temperate, [1,2] - Lava, [1,2] - Alien,  SectorPOIs: - Sun,  # one sun/star playfield is mandatory - AsteroidField, [1,3] - SpaceTradingStation, [1,2] This is what tells the game how many of each type of planet, asteroid field, or trade station to generate. The first number is the minimum number of that type of planet that can generate in your solar system, and the second number (if there is one) is the max number of that type of planet. If a planet shows only 1 number, then that is exactly how many of that planet will generate. To increase (or decrease) the number of planets, simply change the numbers to your liking. The TemperateStarter planet type will add extra starting planets to your new game start selection. You can also add more asteroid fields or trading stations. Do not touch the entry for Sun, there must be exactly 1 sun, no more and no less. Note that by default an extra snow planet is always generated and connected within 15au to your starter planet, in addition to whatever you set here. Here's an example of what it might look like if you wanted to generate more planets: Code: SectorPlanets: - TemperateStarter, [2,3] - Snow, [2,5] # +1 used as neighbor - Desert, [2,5] # needed for resources - Barren, [2,3] - Temperate, [2,3] - Lava, [2,3] - Alien, [2,3] SectorPOIs: - Sun,  # one sun/star playfield is mandatory - AsteroidField, [4,6] - SpaceTradingStation, [2,3] In this example, you will have more of every planet (even starting planets!). I also added some additional asteroid fields and trading stations. You can set your numbers to whatever you want. Simply save the file as solarsystemconfig.yaml, and start a new game using the Default Random scenario! I recommend making a backup copy of your edited solarsystemconfig.yaml file as well because some game updates may override this file and undo your changes. Updates won't affect your save games that you've already started, however. To undo these changes, you can either delete your edited solarsystemconfig.yaml file and rename the backup copy you made earlier to solarsystemconfig.yaml, or you can have Steam verify the integrity of your game files and it will download a fresh copy of the default file. There is a ton more that you can do with the random solar system generator and you can easily create custom scenarios with it using the SSG tool, but that is a topic for a different time. For now, this is just an easy way for anyone to add extra planets to their single player or coop games. I hope it helps some people!