Penny Arcade Adventures: On the Rain-Slick Precipice of Darkness is an episodic action-adventure video game series based on the webcomic Penny Arcade.

Penny Arcade Adventures is an adventure game which mixes 3D gameplay with 2D interstitials and cinematics. The gameplay consists mostly of seek-and-find puzzles, reminiscent of adventure games, where the player must collect items and return them to a character to advance the plot. They can also collect spare robot parts to upgrade their weapons. Battles consist of a real time combat system similar to the ATB (Active Time Battle) system of Final Fantasy Games, with context sensitive button presses reducing damage or being used to carry out special attacks.