Some players have reported that their Steam achievements aren’t being recorded. This appears to happen when the Steam client hasn’t fully updated, so please try the following:
Steam → Help → Check for Steam Client Updates, and make sure the update is fully completed.
Completely exit Steam (right-click Steam in the system tray → Exit Steam).
Reopen Steam and wait for it to fully start.
Launch the game from your Steam Library, not directly from the .exe.
Enter the game and play for a little while.
Previously earned achievements should be added automatically.
This update also fixes an issue on Steam Deck where you couldn’t exit the credits or the special screen after the ending.