Unlocks refers to animals, breeds, customizations and other items that are, or previously were, obtainable through certain means.
Super Milestones
Main article: Super Milestones
Super Milestones provide a way to unlock specific items through reaching certain goals.
Level
Main article: Level
Reaching certain levels unlocks the ability to obtain specific types of 
Animal DNA as a random drop. Levels can also award customizations, however there is currently only one apparel item given in this manner: the Rebellion Helmet, given to the player for reaching Level 30.
Research Lab
Main article: Research Lab
Research Lab allows players to unlock new animals and breeds by spending Animal DNA and 
Super Serum.