98 Greatest Secrets in Video Games

5. Batman: Arkham Asylum – Arkham City blueprints

Why is this so high? Because these were effectively the blueprints for the sequel Arkham City, which stated outright that we’d see a game where Arkham had expanded to take over an old section of Gotham (and remember, this was way before any news of Arkham City ever came out), and NO ONE found them. The developer itself just finally gave up and revealed it to the public, indicating how far our secret finding skills had deteriorated.