Here is the full list of all 30 Sheepy: A Short Adventure achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
You finished the game.
I know this place!
But now you can fly.
You showed Patches who's the boss.
You can do it!
Run as fast as you can.
GOTTA GO FAST
Such an engineer.
The second one!
"Your estimated wait time is forever."
You made a new friend!
"Taking You Higher"
Something happened here...
...but no you can't, because you're a sheep.
You're a smart one, aren't you ?
The first one!
The third one!
Almost done!
The last one?
You lit all the crystals!
BABY, RIGHT 'ROUND
You beat the game in 45 minutes.
You beat the game in 30 minutes.
It feels nostalgic here.
You have activated the 6 levers.
You listened to all the tapes.
Archaeologist is a dangerous job.
Wait, another Sheepy?
You finished the game without dying.
... is awaiting you.