The In the Name of the Tsar Add-on for Battlefield 1 has 5 achievements worth 250 gamerscore.
Play all "In the Name of the Tsar" operations
Kill 25 enemies with the Lance as Cavalry
Win 5 games of Supply Drop
Play a round on all "In the Name of the Tsar" maps
Perform a kill with all "In the Name of the Tsar" weapon variants