Common game engines

Orge: Image engine, which can also be used to develop games and support PC, Mac, LINUX, IPhone, and MIT protocols.
Http://www.ogre3d.orG/about 

SDL: Game Engine, supporting PC, Mac, LINUX, and LGPL protocols.
Http://www.libsdl.orG/index. php 

Blender: this is a free 3d modeling software with corresponding game modules. It provides simple game development environments for programmers without programming experience. However, this is basically not used in China. It is really difficult to make good use of this software. Supports windows, Mac, and Linux.
Http://www.blender.oRg/ 

Love2d: a very compact 2d game engine developed with Lua. It is suitable for developers without programming experience or for making game prototypes. Supports PC, Mac, and LINUX. Zlib/libpng protocol.
Http://love2d.org/

Cocos2d cocos3d: For IDevice and Android game engines, the MIT protocol.
Www. cocos2d-iphone.oRg 

Libgdx: The game development engine in Android. I personally think it is the best game engine on Android. Apache License 2.0.
Code.google.com/p/libgdx

UDK: Unreal game development tool, one of the best commercial game development engines, supports everything from hosts to desktops to handheld devices. Items with less than 50 thousand knives can be used for free.
Http://www.udk.com/

Unity: Forget this. It is also a versatile game development engine. It is relatively lightweight than UDK and has two versions: PC and Mac. Items with less than 0.1 million knives can be used for free.
Http://unity3d.com

HGE: HGE is a very efficient 2D game engine, but it only supports PC, zlib/libpng License. The BASS is only applicable for non-commercial purposes.
Http://hge.relishgamEs.com/ 

Irrlicht: like OGRE, it is also a comprehensive open-source free engine that supports PC, Mac, and LINUX. The private protocol based on zlib/libpng license is used.
Http://irrlicht.sourCeforge.net/ 

Crystal Space: Real-time 3D development kit, which can also be used to develop games and support PC, Mac, and LINUX. LGPL protocol.
Http://www.crystalspAce3d.org/main/Main _Page