Add hidden models.
Such as, a player whom earns it will receive a custom spawn code to create his/her custom model.
A user whom should deserve it would have a model created by another user.
Said model would not be available in unit shops.
The spawn command would be untraceable in cmdlog. Much like a certain command starting with a K, and ending with an I.
Said model would also be immune to the "spawn?" command, much like the Spawner.
=D

