C++ and my own engine I'm making.
However, what you should use is a question of multiple answers, each depending on your level of experience and final objective.
Do you know how to code? What language do you code? Do you code professionally?
Do you want to make a 2D or 3D game? Do you want a desktop, console, mobile or web game? What are the must have features of your game?
Each different answer to these questions can lead you to different languages, engines and technologies.
There's no silver bullet in game development.