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Log in your game ID and check your global ranking.

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The achievement system allows you to earn some great rewards.

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Here you can upgrade your weapons, armor, and backpack. When they have all reached full level, there is no one left inside the 6 floors who is your opponent.

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What secrets are hidden in the surviving AI robots? Currently unknown. But you can get some clues from it, which may help you to retrieve your memory.

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There are always new recruits who don't know the rules, so these might help them.

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If you forget how to fight, come here to activate your fighting instincts.