This page contains Mars Tower Defense Hints for PC - Windows called "Boss wave 15" and has been posted or updated on Jun 10, 2009 by airmailassclown. Let us know what you think of this Hint by thumbs voting.
Boss wave 15
Create two walls just below your base blue cannon and one above it. When the Bosses appear, swap a level 3 blue cannon to the top. As they pass your three primary guns, swap them to the top as well.
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