Factorio Forums

Version 0.15.26 build 30561 win64, steam

Upgrading from 0.14 lost all campaign progress. The player-data.json file contains only entries for "level-01" in each campaign and is missing the "beta" (New Hope) campaign. This can be fixed by editing the player-data.json file to add an object for the "beta" campaign in the "available-campaign-levels" object and adding the other level values to each of the campaign object.

When first started a message that the config file contains illegal values appears with an option to replace the config file. I selected the "yes" option.

Hello, I tried to simulate exactly this.
I had 0.14 steam version with some of the campaign levels unlocked, I moved to 0.15, the config was reset ...

but the campaign progress stayed there, so I have no idea how it happened to you. As you were able fix it and I didn't see anyone else with this problem, I would move this to pending until we have more reports of this problem or it is forgotten forever