First i want to say sorry if this is on a wrong board i'm new so if it is just tell me and i'll be glad to change it. But back to the original question, i'm still learning maya so i'm not an expert by all means on it, and when you click 3 to smooth it i thought that was all you had to do for smoothing but i recently came…
Go into the Mesh menu, and use the smooth command. Although I don't know why you would be smoothing your game meshes. Typically the workflow is to bake the smooth mesh down to a lower resolution model that goes into the game.
Oh i did not know that, i always assumed that just smoothing it would work, as you can see i'm still a novice when it comes to the workflows of things and game engines, which i am changing.