Sudoku by Nikoli V

Rome wasn't built in a day

Complete one puzzle 5 times

Better safe than sorry

View all puzzle guides

Sometimes you just have to give up

Quit more than 50 puzzles

Time flies when you're having fun

Exceed 24 hours total play time

One step forward, two steps back

UNDO 100 times

Slow and steady wins the race

Complete a puzzle

All men are created equal

Complete 12 puzzles in a row on shuffle with all puzzles selected

What one likes, one will do well

Beat the advanced target time for every puzzle

Where there's a will, there's a way

Complete all puzzles