1. Don’t talk about the game for years. (Blade & Soul)
2. Over hype, under deliver. (Assassin’s Creed 3)
3. Make it like a movie. (Beyond Two Souls, Xenosaga)
4. Have unrealistic sales expectations (Enslaved: Odyssey to the West, Tomb Raider)
5. Completely change the economy of the game right before launch. (ArcheAge).
6. Focus on Lore before Graphics, Graphics before Gameplay, Gameplay before Story. (FFXIII, but I love you anyways)
7. Try to make everyone happy. (FFXIII-2)