[2023] how many players do you need?

The issue with missing claim papers on levelup for singleplayer will be addressed with the next hotfix, note that you do not need to claim anything but your house for housing bonus in singleplayer. Feel free to let us know what other changes you have problems with in singleplayer - but make sure you use NoCollaboration preset for difficulty and changed the settings to your liking. You can configure everything from resource cost multipliers to skill gain speed for your sessions :)