With the new crytek editor just around the corner and a full "UDK" equivalent coming, it's good to review for what people who don't know about Crytek's editor, should know what to expect and then choose based on their preference. Personally find the Epic game's style very hard , similarly to ID software's editor , notably Call of Duty map editor was nothing but hell. Post your cons and pros with UT3 editor and Crysis Sandbox 2 ( + Crysis Wars) This is not mainly about technology advance, but more of a style and preference, ease of use. learning curve, and mostly convinience, but also FUN factor. One of the most important aspects of modding is fun, if it's too much annoying, you probably don't continue. Serious modding as well as hobby or freelance. This thread is WIP UE3: Pros: Cons: Crysis Wars Sandbox 2: Pros: Cons: The below is uncomparable until CryEngine 3 SDK is out in August 2011. Report from Crytek in early 2011 about the plans with editors.