Easy and simple fix for the bug that prevents new players from being able to launch the game.
Guide to Fix
- Press Win+R to open the Run dialog.
- Run %LocalAppData%.
- Create a directory SEGA if it doesn't exist yet. Open it.
- Create a directory PHANTASYSTARONLINE2_NA_STEAM if it doesn't exist yet. Open it.
- Create a file name steamupdate.txt by right clicking > New > Text Document (If file extensions are hidden in your explorer, just name it steamupdate).
- Open it in Notepad.
- Put the text v70000_rc_135.
- Save the file then Launch the game from Steam.
It should now launch.