Here is the full list of all 12 Rhythm Journey achievements.
Get perfects in all of the main and the collab tracks (1-21)
Clear all of the main and the collab tracks (1-21) without using the shield
Clear all of the main and the collab tracks (1-21)
Clear all of the main and the collab tracks (1-21) at 1.5x the speed
Clear all of the bonus tracks except XHARD and LONG (22-29)
Clear all of the bonus tracks except XHARD and LONG (22-29) without using the shield
Get perfects in all of the bonus tracks except XHARD and LONG (22-29)
Clear all of the bonus tracks except xhard and long (22-29) at 1.5x the speed
Clear the XHARD and the LONG tracks (30-31)
Clear the XHARD and the LONG tracks (30-31) without using the shield
Get perfects in the XHARD and the LONG tracks (30-31)
Clear the XHARD and the LONG tracks (30-31) at 1.5x the speed