The base game mode of Garry's Mod has no set objectives and provides the player with a world to freely manipulate objects in. Other game modes, notably Trouble in Terrorist Town , are created by other developers as mods and are installed separately, by means such as the Steam Workshop. Garry's Mod was created by Garry Newman as a mod for Valve's Source game engine and released in December , before being expanded into a standalone release that was published by Valve in November Garry's Mod is a physics-based sandbox game that, in its base game mode , has no set objectives. Garry's Mod includes the functionality to modify the game by developing scripts written in the Lua programming language. In late , Facepunch launched the "Fretta Contest", a competition in which people were to develop Garry's Mod game modes using the proprietary Fretta programming framework, with the winning game mode to be added to the base game.
System Shock is a first-person action-adventure video game developed by LookingGlass Technologies and published by Origin Systems. It was directed by Doug Church with Warren Spector serving as producer. The game is set aboard a space station in a cyberpunk vision of the year Assuming the role of a nameless security hacker , the player attempts to hinder the plans of a malevolent artificial intelligence called SHODAN. System Shock 's 3D engine, physics simulation and complex gameplay have been cited as both innovative and influential. The developers sought to build on the emergent gameplay and immersive environments of their previous games, Ultima Underworld: The Stygian Abyss and Ultima Underworld II: Labyrinth of Worlds , by streamlining their mechanics into a more "integrated whole". Critics praised System Shock and hailed it as a major breakthrough in its genre.