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Old 06-01-2010, 07:19 AM   #6
SnapDragon
 
Join Date: Feb 2007
Posts: 97
I wasn't keeping careful track when I got them, but FYI I believe the extenders (4 energy, 4 life) are on levels 2, 4, 6, 8, 9, 12, 14, 15. They don't require a second playthrough; I think they're all obtainable with the aliens you have at that point in the story.
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