CK1 v1.2.11 (Act I) then CK2 3.0.11 (Act II).What is the correct order to play this game, I played a bit when it was first released but didn't love it, thought give a go again. What is the difference between ACT 1 and game before reworking.
Season 1 v15.1.0 is a very outdated version from Patreon. CK1 used to contain 4 Acts. Act 4 was reworked to Episode 1 in CK2. CK1 now contains 3 Acts. CK2 contains 3 Episodes and work is underway on Episode 4. Actually this game is called College Kings 2 - Episode 1 because it contains only 1 Episode, and additional Episodes were added as DLCs and you can finish the game on Episode 1 or buy the DLCs and continue with new adventures. You can import game saves from CK1 to CK2. The latest versions simply contain more content.