Mobcast has released a ninja-themed BREW game on the au network in Japan which uses the level of reception on the phone to determine the main character’s ninja powers.

The game involves sneaking around buildings, avoiding enemies and traps and searching for hidden ninja treasures. The player controls a ninja whose field of vision is directly affected by the current level of reception on the phone. Where reception is good, the field of vision is good, but as reception weakens, so does your ninja vision which makes it much more difficult to avoid traps and find treasure. The game costs 105 yen (around $0.90).

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