Summary
Zorin OS in Launchpad
You can get source code for Zorin OS from here. 
Above Image is from the same website (Under Zorin OS Apps) and you can see GameHub over there .If I am right we could get gamehub out of the box for Zorin OS 16. (I haven't used this). Gaming on ZOrin made easy it seems. @Storm you may like GameHub.
This is under Zorin OS stable. May be we are very nearing to the release. I think Zorin OS 16 is ready and they are making posters and websites it seems.
Just for fun: When's Z16 being released
@storm You may want to be a little optimist. You may change your vote 