How to get all the secret skins in piggy for free.

00:00 - Mr. P
02:59 - Phenna
05:36 - Laura
07:34 - ??? (TIO)
15:52 - Ombra
21:42 - Duocara
26:05 - Bela
28:31 - Sentinel, Willow and Distorted Piggy
29:54 - Blatt
35:14 - Prototype