Cheat Codes:
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Select the „Promotions” option at the „Extras” menu. Then enter one of the
following codes by selecting the corresponding alien.
Gravattack upgrade:
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Enter Feedback, Fourarms, Diamondhead, Bloxx as a code.
Wildvine upgrade:
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Enter Gravattack, Eye Guy, Arctiguana, Wildmutt as a code.
XLR8 upgrade:
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Enter Shocksquatch, Gravattack, Arctiguana, Diamondhead as a code.