In Dynasty Warriors: Gundam 3 for the PS3 and Xbox 360, you can unlock them special Knight Gundam and its special equipment.
Here is the list of Knight Gundams and equipment you can unlock, and what must be done to unlock them.
Knight Gundam – Clear “The Neverending Battle” in Story Mode Chapter: For Reform
Knight Gundam (Pilot) – Unlock the Knight Gundam, then clear the Special Mission “I am Knight Gundam” until your friendship reaches level 3
Knight Gundam’s Upgrade Equipment – Clear “The Neverending Battle” in Story Mode Chapter: For Reform on Hard difficulty then view accompanying message in Terminal