My retail copy says two to four players on the box. No mention of solo play. Does the retail version facilitate solo play, or was there something in the KS version that allows you to do it?
We add SOLO mode as something extra after we produce game and we print SOLO rules on separated flyer which we adding to each copy of the game (our partners should have those rules).
We have also new print of Pocket Mars which include SOLO rules inside the box (but those boxes have 1-4 players inprinted).