there is a 10% code EINF10 working only on new accounts. you will have to create a new e-mail address and extra zavvi account for this (which is done in 1 minute).
the code is eligible on everything including pre-orders.
only working on zavvi.de
and you dont have to stack codes for this as the 2for25€ is automatically applied there without the need of an additional code
hope that helps