Here is the full list of all 160 Shonen Idle Z achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Reach monster level 450
Complete all rank S missions
Complete collection at 100%
Defeat the 40Th boss
Play 5 months
Play 4 months
Complete all rank A missions
Play 3 months
Collect 30 clothes
Collect 27 clothes
Play 2 months
Collect 24 clothes
Collect 21 clothes
Complete collection at 80%
Collect 30 pets
Collect 27 pets
Collect 24 pets
Collect 21 pets
Kill 8 M monsters
Kill 1500 bosses
Collect 18 clothes
Complete collection at 60%
Complete all rank B missions
Kill 1250 bosses
Kill 1100 bosses
Kill 950 bosses
Collect 18 pets
Kill 800 bosses
Get 10 party companions
Kill 650 bosses
Get 9 party companions
Gain 2500 shonen power
Kill 7 M monsters
Get 8 party companions
Kill 500 bosses
Gain 1337 shonen power
Kill 400 bosses
Get 7 party companions
Collect 15 clothes
Kill 300 bosses
Get 6 party companions
Gain 1000 shonen power
Gain 500 shonen power
Reach monster level 400
Reach monster level 350
Defeat the 30th boss
Reach monster level 300
Reach monster level 260
Gain 1 QaD global ki
Collect 15 pets
Gain 1 Td global ki
Reach monster level 220
Gain 1 Dd global ki
Complete collection at 40%
Complete all rank C missions
Defeat the 20th boss
Play 1 month
Collect 12 pets
Collect 12 clothes
Collect 9 pets
Kill 6 M monsters
Kill 5 M monsters
Gain 1 Ud global ki
Kill 4 M monsters
Play 3 weeks
Collect 9 clothes
Reach monster level 180
Gain 250 shonen power
Gain 1 Dc global ki
Kill 3 M monsters
Kill 2 M monsters
Have 150 K training points
Get 1 No attack points
Gain 1 No global ki
Reach monster level 150
Play 2 weeks
Get 1 Oc attack points
Gain 1 Oc global ki
Have 130 K training points
Kill 200 bosses
Kill 1 M monsters
Have 110 K training points
Kill 750 K monsters
Have 100 K training points
Complete collection at 20%
Complete all rank D missions
Get 1 Sp attack points
Have 90 K training points
Kill 150 bosses
Gain 150 shonen power
Collect 6 clothes
Have 80 K training points
Kill 500 K monsters
Have 70 K training points
Collect 300 treasure chests
Play 1 week
Kill 250 K monsters
Collect 6 pets
Have 60 K training points
Gain 1 Sp global ki
Kill 100 bosses
Have 50 K training points
Get 5 party companions
Gain 100 shonen power
Reach monster level 120
Get 1 Sx attack points
Collect 200 treasure chests
Gain 1 Sx global ki
Defeat the 10th boss
Play 3 days
Have 30 K training points
Collect 150 treasure chests
Kill 50 bosses
Gain 50 shonen power
Get 1 Qi attack points
Have 20 K training points
Get 4 party companions
Reach monster level 90
Gain 1 Qi global ki
Kill 100 K monsters
Collect 100 treasure chests
Get 1 Qa attack points
Get 3 party companions
Collect 3 clothes
Have 10 K training points
Collect 75 treasure chests
Gain 10 shonen power
Gain 1 Qa global ki
Reach monster level 70
Play 1 day
Collect 50 treasure chests
Have 5 K training points
Get 2 party companions
Gain 5 shonen power
Get 1 T attack points
Kill 10 bosses
Collect 25 treasure chests
Collect 15 treasure chests
Get 1 party companion
Kill 5 bosses
Gain 1 T global ki
Collect 10 treasure chests
Collect 3 pets
Reach monster level 50
Kill 10 K monsters
Get 1 B attack points
Have 1000 training points
Collect 5 treasure chests
Gain 1 B global ki
Reach monster level 30
Get 1 M attack points
Get 100 K attack points
Reach monster level 20
Gain 1 M global ki
Gain 100 K global ki
Have 100 training points
Reach monster level 10
Kill 1 K monsters
Kill 100 monsters
Kill your first monster