- Agar (engine) - A high-level graphical application framework used by 2D and 3D computer games
- Allegro Library - A free crossplatform C/C++ game programming library, provides functions for graphics, sounds, input, timers, fixed and floating point, 3d, compressed datafile and a GUI.
- Axiom Engine - A fork containing the core of the OGRE graphics engine
- Baja Engine - Professional quality engine used for the game The Lost Mansion .
- Boom - A port of the Doom source code by TeamTNT
- Build Engine - A First Person Shooter Engine used to power Duke Nukem 3D
- BYOND - Short for "Build Your Own Net Dream." Makes various genres of games, including MOGs.Coding,mapping,drawing and testing are all done in one program very simple to use.
- Catmother - A BSD-licensed engine from a company that open-sourced its code when it closed the business.
- CheapHack - An outdated TomazQuake derived engine
- Crystal Entity Layer - An extension of the Crystal Space 3D Engine
- Crystal Space - A general framework for developing 3D applications
- Cube - Powers the computer game of the same name
- DarkPlaces - One of the most advanced free software Quake Engines
- Daybreak Motor - Flexible, object-oriented graphics rendering engine for .NET and XNA (XNA 3D Engine) http://www.daybreak.ru
- Delta3d - Integrates other well-known free software projects into an easy-to-use API, originally developed by the U.S. Navy
- DGD - An object-oriented programmable MUD engine
- Dim3 - although not well-known and developing is macintosh-only, games can be played on Mac, Windows and Linux. Very easy and
- Doom Engine - The now free software engine originally used for the hugely popular Doom and Doom II
- DXFramework - A simple, pedagogical 2D/3D DirectX-based game engine for Visual Studio
- DX Studio - Real-time professional 3D engine and editing suite produced by Worldweaver Ltd
- Epee Engine -Is a 2D graphics engine with beginning programmers in mind
- Eternity Engine - A source port of the Doom engine
- Exult - A free software reimplementation of the Ultima VII game engine
- FIFE - A free software 2D ISO engine supporting the assets of Fallout 1 & 2
- Game Blender - A sub-application of Blender for creating games
- Game Maker - Object-oriented game development software with drag-and-drop interface and its own scripting language
- GQ - A Quake engine that adds features from TomazQuake and DarkPlaces
- GZDoom - A source port of the Doom engine based on ZDoom
- Genesis3D - A real-time 3D engine for Windows
- GemRB - A free software implementation of the Infinity Engine
- Horde3D - A lightweight next-generation graphics engine
- Id Tech 2 - Formerly known as the ''Quake II engine'', the original open-source engine from Id Software .
- Id Tech 3 - Formerly known as the ''Quake III engine'', the original open-source engine from Id Software .
- Irrlicht Engine - A cross-platform and lightweight three dimensional graphics engine.
- JMonkeyEngine - An open-source, BSD licensed Java scenegraph engine.
- Jogre - a Java based client/server game engine and API for online real time games such as chess, checkers, etc.
- KallistiOS - a free, BSD licensed development library for the Sega Dreamcast, by Dan Potter.
- KonsolScript - opensource scripting language primarily intended for writing desktop 2D games by Mj Mendoza IV.
- M.U.G.E.N - A 2D fighting game engine
- Multiverse Network - an MMOG platform, including server, client, and tools. (Free for development and use--revenue sharing upon commercial deployment).
- Nebula Device - A realtime 3D game engine developed by German game studio Radon Labs.
- OctLight - A Java game engine that uses scene-graph and renders on top of Lightweight Java Game Library (LWJGL) using OpenGL
- Open Game Engine is an open source library combining the components used to make games.
- OGRE Engine - A very popular object-oriented graphics rendering engine. Also called OGRE3D
- Panda3d - A relatively easy to use python-driven game engine.
- Pentagram - A project to create a game engine that is capable of running
- PLIB - A game engine - includes 3D, Audio, Music, GUI, Window manager and is portable Linux/Windows/MacOSX.
- ProQuake - A modified Quake engine
- RealmForge - An open-source game engine for the Microsoft .NET Framework, predecessor to Visual3D.NET
- Retribution Engine - A game engine to make first person shooter games
- Sauerbraten - A upgraded engine forked from the Cube engine
- Sploder - A Free Web-Based Flash Game Maker (in Beta).
- Stratagus - A cross-platform real time strategy game engine
- Telejano - a modified Quake engine
- Tenebrae - One of many Quake Engine clones
- vbGORE - Open source MMORPG engine in Visual Basic 6.
- World Builder - A pre-MacOS X game engine.
- XtremeWorlds - a simple, and widely used 2D Online RPG Engine.
- Aurora Engine - For Role-playing Game s
- BRender - A real-time 3D graphics engine for computer games, simulators and graphic tools
- C4 Engine - An emerging next-generation computer game engine created by Eric Lengyel
- Coldstone Game Engine - an old game creation suite for Macintosh/Windows to create role-playing or adventure-style games
- CPAL3D - is a engine for 3D games and applications. It contains own game content editor and script compiler. It's made by Centauri Production and used in adventure Memento Mori (game) , rpg Numen or 3rd person shooter Pound of Ground.
- CryENGINE , CryENGINE2 - The game engine used for the first-person shooter computer game '' Far Cry ''. CryENGINE2 is a new generation engine developed by Crytek to create the unreleased FPS game '' Crysis ''.
- Dagor Engine 3 - A high-tech cross-platform game engine (3D, physics, game logic) with rich toolset for content development
- Doom 3 Engine - (Also known as id Tech 4) Used by the games '' Doom 3 '', '' Quake 4 '', '' Prey '' and '' Quake Wars ''
- DX Studio - Engine and editing suite that allows rapid creation of real-time games and simulations
- Earth-4 Engine - The graphics engine used in '' Earth 2160 ''
- Electron Engine - Currently in development by Obsidian Entertainment for their game '' Neverwinter Nights 2 '', based on the Aurora engine
- Elflight Engine - High-performance cross-platform 3D streaming game engine designed from the ground up for use over the Web. Games can play in a web browser window, in a separate window or full-screen. Java and OpenGL based.
- EMotion FX - A real-time character animation SDK and tools by Mystic Game Development .
- Euphoria - A real-time motion synthesis engine by NaturalMotion
- Explorations - 2D MMO creator
- ''
- Gamebryo - A cross-platform 3D computer graphics engine coded in C++
- Havok - High-tech cross-platform (PC, PS3, Xbox 360 etc) middleware engine
- IMUSE - Specifically designed to synchronize music with visual action
- INSANE - Used in LucasArts games
- Infinity Engine - Allows the creation of isometric computer role-playing games
- '' and '' Outlaws ''
- Kaneva Game Platform - A full featured MMOG engine for independent and professional game development
- KjAPI - A C++ technology to create games and 3D applications for PC computers
- Lithtech - A competing alternative to the Quake, and Unreal engines.
- Lithtech Jupiter Ex - A new generation Lithtech engine developed by Monolith Productions to create the game '' F.E.A.R. ''
- Medusa - A C++ 3D game engine developed by Palestar and used in the '' DarkSpace '' MMO. It features distributed world simulation, single tool version control and asset realisation, cross-platform compatibility and an integrated client/server network system.
- Monumental Technology Suite - A MMOG platform, including server and client technology and development / live management tools.
- Multiverse Network - An MMOG platform, including server, client, and tools. (Free for development and use--revenue sharing upon commercial deployment).
- NeoAxis Engine - A game engine and toolkit designed for the creation of game titles for all genres, as well as 3D visualization and Virtual Reality projects.
- Offset Engine - In development, being used to create fantasy FPS '' Project Offset (working Title) ''
- ''
- Power Render - A general purpose software development kit for games and 3D visualization
- RAGE - A game engine created by Rockstar Games use it to power their upcoming video games on the Xbox 360 and PlayStation 3
- Realm Crafter - A 3D MMORPG specific game engine with an easy click-and-drop design. Easy to learn scripting language.
- RelentENGINE - A next-generation FPS engine supporting massive destroyable city environments and realistic vehicle control, makes extensive use of shader model 3.
- RenderWare - A very popular 3D API and graphics rendering engine
- Revolution3D - A 3D graphics engine developed by X-Dream Project
- RPG Maker XP - A 2D engine to make top-down and isometric-style role-playing games for Windows.
- SAGE Engine - Used to create Real-time Strategy games
- SCUMM engine - Used in LucasArts graphical adventure games
- ''
- Shark 3D - A middleware from Spinor for computer, video games and realtime 3D applications
- ShiVa - An all-in-one 3D game development platform. The engine (Ston3D) is available for Windows and Macintosh, and can be used inside a web browser.
- Silent Storm Engine - A turn-based strategy game engine
- ''
- Source Engine - A game engine developed by Valve Software for '' Half-Life 2 ''
- Torque Game Engine - A modified version of a 3D computer game engine originally developed by Dynamix for the 2001 FPS '' Tribes 2 ''
- Torque Game Engine Advanced - A next-generation 3D game engine support modern GPU hardware and Shaders .
- TOSHI - A fourth generation cross platform game engine designed by Blue Tongue Entertainment
- Truevision3d - A 3D game engine using the DirectX API
- Unigine - Cross-platform middleware with great graphics
- Unity - An easy-to-use open-ended 3D game/interactive software engine
- Unreal Engine - One of the most popular game engines for action games
- Vengeance Engine - A video game engine based on the Unreal Engine 2/2.5
- Vicious Engine - Available for Microsoft Windows, Sony PlayStation 2, Microsoft Xbox, and Sony PlayStation Portable
- Visual3D.NET - 3D platform and visual development environment built upon Microsoft .NET 2.0 and XNA Framework for developing for PC, Xbox 360, and Windows Mobile devices using C#, Visual Basic, J#, C++.NET, JScript.NET, IronPython, and visual scripting.
- Virtools - A 3D engine combined with unique high-level development framework, used for game prototyping and rapid developments. Available for Windows, Macintosh, Xbox, PSP
- White Engine - Square-Enix 's proprietary seventh generation game engine to be used for their PS3 projects.
- XnGine - Developed by Bethesda Softworks , one of the first true 3D engines
- GledPlay - A complete SDK to develop games for mobile devices.
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