-No matter how simple the concept for the game, try and add as much context and content over the top of it.
-People love loading screens! To get as many loading screens as possible, don't compress any animations or stream levels!
-Speaking of animations, you don't need animators if you have motion capture! Just mo-cap what you need and you're set!
-Gamers love paying for stuff! Make your $60 single player game lock out story content until they pay the low price of $19.99 a month!
-Is your game taking more than 3 hours to finish? Well that's too long! Cut it abruptly and sell the rest later as DLC! See above!
-You say your game isn't very good? Add boobs and violence! You'll get extra sales that way!
I have more, but I think I got most the important ones out there to really make a "great" game.
