This page contains Metal Slug 3D Unlockables for Playstation 2 called "Laboratory staff" and has been posted or updated on Sep 4, 2007 by bigsal. Let us know what you think of this Unlockable by thumbs voting.
Collect the CDs hidden in the various locations in every mission. Then, enter the "Garage" screen and select "Laboratory". The staff will be found inside.
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