Infinite PS:
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Buy it at the shop for 5000 credits.

Infinite Specials:
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Buy it at the shop for 5000 credits.

Infinte Thrust:
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Buy it at the shop for 5000 credits.

Lacus Clothing Type A:
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Buy it at the shop for 300 credits.

Lacus Clothing Type B:
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Buy it at the shop for 800 credits.

Lacus Clothing Type C:
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Buy it at the shop for 1000 credits.

Lacus Clothing Type D:
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Buy it at the shop for 1500 credits.

Very Hard Mode:
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Buy it at the shop for 1000.

Alternate Costumes for Lacus:
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Buy the 4 different costumes at the shop for either 300, 800, 1000 or 1500.
She will randomly appear in one of them when you visit the shop.