Tetris Effect: Connected

Journey mode has twenty seven levels divided in seven different areas. There is no difficulty constraint, so you can get the achievement in beginner, normal or expert, or even mixing the difficulties.

Each level in an area is played in sequence, so the grade is determined by the sum of points of each level. In order to get an A grade in beginner, you need to score around 10.000 points per level, with the last level being the exception, needing around 30.000 points.

Keeping high combos, making use of "the zone" and special moves like back-to-backs or t-spins is vital to get the needed points.

See the table below for the points needed per area in Beginner.

Area 1 (3 levels): ~30.000
Area 2 (4 levels): ~40.000
Area 3 (4 levels): ~40.000
Area 4 (5 levels): ~50.000
Area 5 (5 levels): ~50.000
Area 6 (5 levels): ~50.000
Area 7 (1 level): ~30.000

* points are an educated guess based on the scores I got, but in Area 3 I got an A grade with ~37k points in Area 6 with ~46k points, so it's probably somewhere between 9k and 10k per level. For area 7, I got an A with ~29k