The first version of the SDK came with tools and assets the modders require to get their own creations exported into the Sandbox2 Editor which allows them to create complete new levels and modifications with outstanding content.
The Mod SDK v1.2 is the second release and includes the highly anticipated game source code of Crysis. With this code it is possible to implement your own functionalities and brand new features into the game and share it with the community.
In addition CryTek re-worked the installer to fix some problems and to make the whole installation process more comfortable to you. CryTek also implemented the Softimage|XSI Mod Tool as separate zipped file that comes with example assets for you to work with.