Sorta correct. No games today (PC or console) are designed in assembly. C/C++ and other OBJECT ORIENTED LANGUAGES (OO) are the primary languages used in game design for both PC and Console games.

This may go a little further than your original question, but there are 2 phases of game design. Designing the game engine, and desigining the actual game. There are games engines out there that once built, you can use lua scripting or even just plan text files to build the games (XML/lua for AI Scripting or GUI placement).(very very top level). The engine though, is almost always written in C++ or a similiar OO language.

If you are interested in breaking into the field send me a PM. I have been designing/coding games both for companies and solo for almost 7 years now. I can at least point you in the right direction.