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

Episode 1 was released on May 21, 2008 on Linux, Mac OS X, Windows, and Xbox Live Arcade, and was later released on PlayStation Network on October 23, 2008. There is a demo available which can be upgraded to the full game. It was later released on Steam, with new Steamworks support. Episode 2 was released on Linux, Mac OS X, Windows, PlayStation Network, and Xbox Live Arcade on October 29, 2008.

The game was originally planned to be distributed episodically across four games. In March 2010, developer Hothead Games chose to devote its resources instead toDeathSpank, discontinuing its development of further episodes.[3] Subsequently, prose chapters constituting the plot of Episode 3 were presented on Penny Arcade's website.[4] In August 2011, Zeboyd Games announced that it would be developing Episode 3[5][6] albeit in a completely different graphical style.[7]

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