Dude, I've worked in the gaming industry for over 10 years. I've made AAA 3D games for a living. i've played 3D games before we even had 3D accelerators. Elite on the Commodore C64 is a 3D game. Look at https://unity3d.com Unity 3D is a game engine to make 3D games. Only recently did they add good support for 2D game creation on the platform.
If somebody is talking about 3D games, they are only talking about three dimensional rendered games. Hence how Diablo 3 would be called a 3D game.
Keep ignoring that Google search