There are a
10 Secret Collectibles.
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This is The Level Number & Time
in the Video Below
1: Level 12 = 0:00
2: Level 31 = 1:31
3: Level 35 = 2:58
4: Level 37 = 4:15
5: Level 46 = 5:30
6: Level 49 = 9:29
7: Level 62 = 8:50
8: Level 71 = 9:53
9: Level 74 = 11:33
10: Level 79 = 13:57
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Here's Video for all The Collectibles.
This Video isn't mine Note: This Also Work For "Super Secret" and "Shhhh Secret" Achievements