It's the work of Roblox developer PewStudio, who cites Peak and another game called Mountain Climbing as inspiration. "Special thanks to those amazing creators!" the Cliff description reads.

Peak Dev Says Players Pirating It Is Better Than Playing "Microtransaction-Riddled" Roblox Imitator Co-developer Landfall "cosigned" this statement. By Oisin Kuhnke on August 5, 2025 at 5:39AM PDT ...