Here is the full list of all 27 Harvest Moon: Mad Dash achievements.
Get three stars on all Stages!
Harvest a 7 x 7 item!
Harvest a 5 x 5 coconut water!
Complete all Stages!
Get all the Time Seeds!
Complete 90 Stages!
Complete 80 Stages!
Complete 70 Stages!
Complete 60 Stages!
Get 4 Time Seeds!
Use one hay bale to feed 4 livestock!
Harvest all types of items!
Complete 50 Stages!
Complete 40 Stages!
Activate Power Mode 100 times!
Freeze the whole field...
Activate Power Mode 5 times on the same Stage!
Get hit by a wild boar, coconut, or magma 30 times.
Complete 30 Stages!
Harvest a 5 x 5 item!
Get a Time Seed for the first time!
Complete 20 Stages!
Activate Power Mode with one second left!
Hit the fishing button 30 times during a fight!
Complete 10 Stages!
Have a crop die...
Harvest a 3 x 3 item!