Source Engine

Play the popular game using the Source game engine

… a new level of game play, give Counter-Strike: Source a try. The original game let you pick between …

PRO: The best team experience
CON: Not compatible with non-official maps
Vote: 6.4/10 (1806 votes) Platform: Windows

Open-source title to help gamers learn how to dominate their favorite titles

… Engine is an open source program that lets you share information with other players, and pick up tips …

PRO: Includes guides and tutorials
CON: Hard for casual gamers to understand
Vote: 7.2/10 (11083 votes) Platform: Windows

Movie-making software developed and used by Valve

… the Source Filmmaker software is a fantastic way by which you can create and animate your film projects …

PRO: Imports levels and characters from your favorite Valve games
CON: Requires good graphics card
Vote: 6.7/10 (480 votes) Platform: Windows

Tool used to create mods of computer games

… be shared between users. Because Cheat Engine is open source software, there is a large community of people …

PRO: Includes tutorial
CON: Can't use for online game
Vote: 6.5/10 (26 votes) Platform: Windows

Create and edit custom maps on the go.

… Google Maps Engine is a versatile tool from Google that facilitates the creation and sharing …

Vote: 4.0/5 (85 votes) Platform: Android

PC version of the popular N64 console

PRO: The most polished update they have ever produced
CON: Finding good servers is sometimes tricky
Vote: 8.9/10 (7 votes) Platform: Windows

OpenMicroWave is an open-source reimplementation of the Morrowind game engine.

… Source Game Engine OpenMW serves as a free and open-source game engine that enables the original …

Platform: Android