Games by MASK

Learn German, French, and Italian simultaneously! The ultimate time-efficient learning puzzle game

Let's learn about space in a fun way with a quiz that rotates images! By comparing photos, you can get to know the universe even better!

Easy & Fun Spot the Difference! A Cute Brain-Training Game to Boost Your Mind

Can you spot the shift?

Find mistakes in Thirty-six Views of Mt. Fuji! Enjoy brain training while looking at Ukiyo-e!

Something in this era doesn't belong. Trust your common sense and spot it.

Which One Doesn't Belong? Sharpen Your Reflexes with This Spot-the-Difference Brain Game!

Which Pictogram Doesn’t Belong? A Fast-Paced Brain-Training Spot-the-Difference Game

That Aha! moment feels so refreshing! A new kind of brain-training puzzle using letters and clever thinking

Become a star pilot and fly through the universe of quizzes!

Can you fix every twist?

Find mistakes in cute panda pictures! Enjoy brain training while being healed by pandas!

眩しいほど青春なあの子と 間違い探しで胸キュンしよう！

Northern or Southern Hemisphere? Swipe to Decide in This Binary Geography Quiz!

The answer you choose reveals a hidden truth about you. And the instant you finish reading it — a chill.

Can you trust your memory?

Find the secret items hidden in the pretty illustrations!

Find the Hidden Secret Items in Cute Illustrations!

Enjoy Brain Training with Adorable Baby Animals from Kittens and Puppies to Penguins and Seals!

Spot the Difference in Kitten Photos! Enjoy brain training while being soothed by adorable cat images.

Spot the Difference in Puppy Photos! Enjoy brain training while being soothed by adorable dog images.

Find the Differences in the Photos of Sea Creatures! Not just cute fish, but also dolphins, seals, and jellyfish!

Find mistakes in Japanese landscapes! Enjoy brain training while being healed by Japanese landscapes!

Find the hidden mistakes among the sparkling stars! From galaxies and planets to meteor showers and astronauts — it’s Spot the Difference: Space Photos!

"The Statue of Liberty is barefoot."← True or False!? Acquire global trivia with a 2-choice quiz!

もふもふケモ耳美少女と 間違い探しで癒されよう！

100 questions to reveal your one-and-only love destiny!

Oh, did you ‘see’ it…? Spot the Difference in Horror Illustrations

Study the scene, then choose! Can you recall the hidden detail?

Find the hidden character in the illustration! A timed picture puzzle game that sharpens your eyes and challenges your brain

Find the Right Person Before Time Runs Out! A Fun and Cute Brain-Training Search Game

Have fun with your family♪ Find the hidden FOOD!

Where’s That Insect Hiding? A Cute and Easy Brain-Training Picture Hunt Game

Find it and smile! A family-friendly octopus hunt!

Find it and smile! A family-friendly tuna hunt!

Where is the flower labeled “仙人掌” in the illustration? Let’s learn KANJI, even difficult ones for Japanese people, in a fun way through this game!

Are Your Bones Really Harder Than Steel?! Become a Body Expert Through Fun Quizzes