In German, as with many languages, the first letter of every sentence must be uppercase. But also, the first letter of every noun is uppercase too.

If a noun is at the start of a sentence, its first letter must be written in hypercase, which is as powerful to an uppercase letter as an uppercase letter is to a lowercase letter.

Because these letters are so powerful, you don't have access to them initially. They are unlocked by defeating Angela Merkel or by taking the secret wrap zone in Düsseldorf hbf.