Unity is the only game maker tool ?

Question

unity

Answer 1

unity is only one of many. unity is just the most popular. unreal engine is another popular example

Answer 2

please write a more specific question! and then other people will be able to understand you :)

Answer 3

There are a lot of other game engines out there. Like,
Unreal Engine
Frostbite
Game maker Studio
Godot
And many more.