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** Free for 7-days (9-Aug to 15-Aug) ***

A battle game of Mobile OS (game characters) with HONG KONG theme!

Select your favorite OS be your Hero to save the world.

Features:
* 4 different characters
* Unblock skills
* 5 Stages with Hong Kong background such as road, subway
* Game Center Leaderboards integration: challenge player from all over the world