
Find all 408 hidden differences across 30 hand-drawn illustrations,… or test your observation skills in endlessly replayable procedurally generated challenges!
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A find-the-difference game... with a difference!
Compare two versions of individually painted illustrations side by side and uncover differences.
No time pressure
30 hand-drawn illustrations
10–15 differences per scene
Designed for relaxed, focused play
Each card is constructed from multiple elements (backgrounds, shapes, details) combined into unique compositions. Find as many mismatched cards as you can within a time limit and rack up the combo counter!
Procedurally generated layouts
Increasing complexity and density
Endless variation
• 408 differences to discover
• Two distinct game modes
• Relaxing and challenge-focused gameplay options
• Suitable for short sessions or longer play
• Simple controls requiring only a mouse
Steam lists the 脳活 408まちがい全部見つけよう! release date as Aug 6, 2026.
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