Here is the full list of all 10 Cornerstone: The Song of Tyrim achievements.
Craft a raft
Walk
Unlock the ship
Defeat the Rocklord
Finish the cutscene in Rockwell library
Throw a sheep in the bottomless pit in Dune Cave
Throw a sheep in the bottomless pit in the Veil
Kill a Rocklover with a book
Complete the game without dying
Throw and kill a chicken against the wall