Game category: Puzzle
Professor Neumann's Adult Certification Test
Animals, nature, space, the human body — does your knowledge measure up?
Psychopath Mind Quiz: Unmask Their Dark Nature
Can you spot the dark twist?
Puzzle Adventures - Farm Animals
Puzzle by Nikoli S Hashiwokakero
Draw as many connecting lines as indicated by the numbers in the circles.
Puzzle by Nikoli S Hitori
A puzzle for connoisseurs. Are you up for a challenge?
Puzzle by Nikoli S Kakuro
Puzzle by Nikoli S Masyu
Nikoli's original puzzle using only black and white circles for hints.
Puzzle by Nikoli S Numberlink
Intuitive puzzle where you draw lines to connect the same numbers.
Puzzle by Nikoli S Shikaku
Divide the grid into rectangles in this remarkably satisfying puzzle.
Puzzle by Nikoli S Yajilin
Draw a loop and paint cells black in this double-challenging original puzzle from Nikoli!