Which software is used to create a game

Answer 1

You could create 2D games with almost every languages like HTML,PHP,C,C++,JAVA OR PYTHON..
For 3D games,you should try C++ and Java..
And there are two popular 3D engines as Unity & Unreal(Ex:PUBG)
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Answer 2

There are lots of software for this, I recommend you this YouTube channel https://www.youtube.com/playlist?list=PLqlV9u4jszMcsFhP9Juy4VrcwMXUWC-VQ

They're a really good source for beginners, good luck!