TierZoo is an educational web series and YouTube channel created and hosted by Patrick "Patch" Lacey.

[3][4] The series discusses animal-related topics such as wildlife ecology and evolutionary biology through a video gaming lens.

RuneScape, Overwatch, and Dark Souls are specific games which Lacey borrows text from, which he overlays on his videos.

[3] In April 2018, Kotaku covered TierZoo's "Earth's Worst Balance Patch" video which discussed dinosaurs and their extinction.

[14] Despite finding success with his pivot to full-time content creation, Lacey was denied the ability to rent an apartment as the landlord did not see his TierZoo venture as legitimate.