In the later stages of Game Dev Tycoon you have the ability to develop your own console. This almost works the same way as developing a game. You have to decide what you want out of the console and what it looks like.

Here's an overview of what your custom console can look like.

Version 1 Version 2 Version 3
Skin 1V1 Skin 1V2 Skin 1V2
Skin 2V1 Skin 2V2 Skin 2V2
Skin 3V1 Skin 3V2 Skin 3V3
Skin 4V1 Skin 4V2