Can the blender game engine render diffuse material nodes? I have a plane with a diffuse material of a blue color, a cube of a red color. I can see them perfectly well using cycles. When I use the game engine render all I get is gray no colors. Can the blender game engine render diffuse material nodes?

Is there a node that says render node to game engine renderer?
The blender game engine cannot render cycles materials. This might bring similar results, It's not currently available for download at the time of writing.