Azul: Crystal Mosaic
Depends on your groupBGG 7.26 from 2,471 ratings. One reviewer calls the overlays a must-have; a BGG owner rates it 3 of 5 and may skip them.
Needs: Just the base game
Adds: New double-sided player boards, some with pre-printed x2 spaces, plus four clear overlays that hold tiles and score markers in place.
Fixes: The overlays stop tiles and score markers sliding when the table is bumped.