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