Here is the full list of all 29 Shephy achievements.
1,000 sheep survived.
Cleared the round using less than or equal to 50 cards.
Clear the Basic mode.
More than 1 sheep died.
Clear the Tutorial.
Clear the Challenge mode.
Clear the Challenge mode 10 times.
View the Prologue for Post Loves.
Clear the First Chapter in Post Loves.
Clear the Second Chapter in Post Loves.
Clear the Third Chapter in Post Loves.
Clear the Fourth Chapter in Post Loves.
Clear the Fifth Chapter in Post Loves.
Clear the Sixth Chapter in Post Loves.
Clear the Seventh Chapter in Post Loves.
View the Epilogue for Post Loves.
Achieved 1,000 sheep in Challenge mode.
Achieved 5,000 sheep in Challenge mode.
Achieved 7,000 sheep in Challenge mode.
10,000 sheep survived.
100,000 sheep survived.
More than 10,000 sheep died.
Cleared the round using less than or equal to 35 cards.
Cleared in under 10 minutes.
Cleared in under 5 minutes.
Cleared in under 3 minutes.
Lost the game in Basic mode.
Opponent got to 1,000 sheep in Basic mode.
Completed the Gallery.