Leave your game open enough so that you can add new armors, weapons, skins, vehicles, and classes AFTER the game launches.
I remember far too many "Awww man! That would be so cool to have in MP! Too bad we can't...." moments for the Halo series.
If you could also learn to Show and not Tell that would be fantastic too. (Reach)
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[quote]Leave your game open enough so that you can add new armors, weapons, skins, vehicles, and classes AFTER the game launches.[/quote]In the Industry they call this "Sequels" :)