One game client on multiple platforms?

Question

Game development

The customer wants to make a cross-platform game so that one client can run on PC, consoles, and tablets.
And the game is difficult, not casual. I doubt that this is possible, although he is ready for a decent budget. Tell me what engines are capable of this. Unity?

Answer 1

In our office, complex toys are written in Unity, simple 2d toys in Cocos-2dx (C ++)
Unity is a very nice thing, if you have money for a license and a 3D game, you should take it.

Answer 2

You still have to get a license for the console. And this is a tricky one.