The source code for a canceled game from Valve Corporation, titled F-STOP, has been leaked, according to a new rumor.
The alleged leak was shared by BlueSky user ossyflawol, who revealed details from Valve Corporation’s source code for F-STOP, also known as “Aperture.” The project is said to have been an early version of what would eventually become Portal 2, with development dating back to around 2008.
According to ossyflawol, the leak contains code from several of Valve Corporation’s experimental projects, including “Margharita” and “2 Bots 1 Wrench.” Margharita was apparently an experiment in expanding enemy artificial intelligence, particularly for Combine Soldiers. The BlueSky user claimed that elements of this work were later implemented into the 2008-era development of Half-Life 2: Episode Three.
“2 Bots 1 Wrench,” meanwhile, explored more interactive NPCs through Valve Corporation’s Response Rules system. The experiment is said to have featured two robots commenting on objects and events within an edited version of Nova Prospekt. While the source code for the experiment was leaked, its Response Rules are said to be missing.
The screenshot accompanying the post show a large collection of C++ source files. Among them are files named npc_hover_turret.cpp, npc_companionbot.cpp, npc_medibot.cpp, prop_portal_tunnel.cpp, and numerous AI behavior files, hinting at the game systems included in the alleged code dump.
The leak is said to also contain remnants of Episode 3 code scattered throughout the Half-Life 2 portions. The BlueSky user clarified that while it isn’t complete code, it includes nearly everything that would’ve been outside the dedicated ‘Ep3’ folder. The code is apparently dated during the brief ‘Hybrid Era’ of development, when F-STOP slowly morphed into Portal 2 proper.
In related news, 12 terabytes of Valve Corporation’s internal game builds and assets from 2003 to 2013 were leaked on Steam. It spanned a decade of the company’s development history, encompassing numerous game builds, beta versions, dedicated servers, development tools, shared assets, localization files and other material associated with some of the company’s most influential games.
