Here is the full list of all 30 Kirakira Slimes achievements.
Merge 100 slimes
Merge 500 slimes
Merge 1000 slimes
Merge 2000 slimes
Merge 5000 slimes
Reach a score of 1000 points or more
Reach a score of 5000 points or more
Reach a score of 10000 points or more
Reach a score of 20000 points or more
Reach a score of 30000 points or more
Reach a x5 multiplier
Reach a x8 multiplier
Reach a x10 multiplier
Reach a x15 multiplier
Get all the slimes
Get the lion slime in less than 5 minutes
Get the bear slime in less than 5 minutes
Get the tiger slime in less than 5 minutes
Use the ability power 2 times in one game
Use the ability power 3 times in one game
Use the ability power 4 times in one game
Get the lion slime
Survive 30 minutes in one game
Survive 60 minutes in one game
Merger two lions
Finish your first game
Finish 10 local games
Finish 25 local games
Finish 50 local games
Finish 100 local games