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