Here is the full list of all 20 BREAK ARTS II achievements.
Spend a total of 99 hours in Machine Design
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Reach #1 in all Unofficial Races(Excluding EXTRA)
Reach #1 in all Grand Prix(Excluding EXTRA)
Accumulate a total of 250 breaks
Play Online Multiplayer once
Spend a total of 30 hours in Machine Design
Make it to Rank 7
Create a weapon with single-shot damage of over 10000
Spend a total of 10 hours in Machine Design
Make it to Rank 4
Reach a top speed of 500 during a race
Play Time Attack once
Spend a total of 1 hour in Machine Design
Start Break Arts for the first time
Break for the first time
Make it to the highest rank
Reach #1 in all Unofficial Races
Reach #1 in all Grand Prix
Complete all titles