What is the name of software to game designs .

Answer 1

For 2D:
1.libGDX(Best)
2.Godot
3.Unity(Best for Beginners)
4.App Game Kit
5.Monkey X Pro
6.OXygen 2D
For 3D:
1.Unreal Engine 4 (Best)
2.Cryengine V
3.Unity3D(Best for Noobs)
4.Havok Engine
5.Frost Engine
6.Source Engine
Most of the games are currently made with (Unreal Engine,Cryengine,Unity&Frost)

Hope I will find what you need.:)

Answer 2

...or Unreal

Answer 3

You can use Unity.