Here is the full list of all 12 Runes achievements.
Get gold stars for all 120 puzzles.
Get silver stars for all 120 puzzles.
Solve all 120 puzzles.
Accomplish a puzzle with 9 or more gold moves remaining.
Get gold stars for the first 60 puzzles.
Get silver stars for the first 60 puzzles.
Solve the first 60 puzzles.
Accomplish a puzzle with 6 or more gold moves remaining.
Get gold stars for the first 20 puzzles.
Solve the first 20 puzzles.
Get silver stars for the first 20 puzzles.
Accomplish a puzzle with 3 or more gold moves remaining.