Coding resources

For anyone wanting to learn about coding in CryENGINE 3:
CryENGINE 3 Programming & Scripting Forum
CryENGINE 3 Technical Documentation
CryENGINE 3 Scripting Manual
GameDLL C++ documentation
Precompiled Engine headers documentation
(for the actual code open CryENGINE\Code\Solutions\GameCodeOnly.sln with an Express Version of Visual Studio C++)

For programming (and C++ setup) tutorials, 1Richmar's channel is useful: https://www.youtube.com/user/1richmar?feature=results_main. He has some tutorials about UI and AI, too.

For much of the coding Lua is enough, but you should have at least a very basic understanding of how C++ syntax works + things like building solutions, creating new classes.

GameRules scripting:
Crysis Instant Action Lua Analysis (CryWiki)
Robbery GameRules Lua example (CryWiki)

Very helpful Ande. Thank you.