Here is the full list of all 40 Poop Clicker achievements.
Have 1 Atom
Have 1 Death star
Have 1 Donut
10000000000000 per second
1500000 per second
50000000000 per second
500000 per second
Have 1 Luck
Have 1 Brainstorming
Have 1 Laxative
15000 per second
Have 1 Bot
Have 1 Sharingan
5000 per second
Have 1 Friend's help
150 poop per second just from Red plunger
Have 1 Potato
300 poop per second just from unicorn
Unicorn upgrade
1000 per second
Have 1 Unicorn
Red plunger upgrade
Have 1 Plunger
500 per second
40 poop per second just from Hot pepper
100 poop per second just from corn
Corn upgrade
Have 1 Corn
20 poop per second just from nfs
make 100 poop per second
Hot pepper upgrade
Have 1 Hot pepper
Need for speed upgrade
Have 1 NFS
0 poop per second just from quick tap
Quick tap upgrade
Have 1 Quick tap
Your first poop
Have 1 Poison
Have 1 Cookie