Complete the indicated task to unlock the corresponding costume.
For each of the 14 playable characters of Class 0, there are alternate costumes. Each unlock requires 30 killsight (red reticule on target) kills per character. You can see how many you have in the library entry.
Breed the indicated Chocobos to get the corresponding offspring.
Choose a character that has upgraded Dodging capabilities (for example, Ace) then intentionally fail a SO. As soon as you fail, keep dodging until you avoid three instant death circles.
Complete any non-real time strategy mission with only one cadet. After accepting the mission, refuse any assistance. No additional reserves are allowed.
Like all collectibles, Knowing Tags glow like a shining star. Knowing Tags are usually found near the dead cadets that carried them. You can farm Knowing Tags outside the main storyline. Go to the main menu, then select "Missions". Load your main saved game. Select "Capture of Togoreth Stronghold". Run inside, go to the first gate, then eliminate the leader to open the gate. Run through the gate, then move directly head until you encounter two mechas on the wall. Ignore them and run to the left to find an area with a gate and a golem. Destroy the gate in order to leave this area. Instead of going up the stairs, move straight to the next area, which features a giant wooden door. Eliminate the leader and enter the doorway (second laboratory). This area has three Knowing Tags on the ground. The next room has one Knowing Tag on the ground. Complete the mission. Repeat the process as many times as needed.
This can only be earned between missions 1 and 2 in Chapter 7. The first mission of Chapter 7, "The Kingdom's Final Hours" is a real time strategy mission that can be completed easily or skipped freely. Afterwards, go to the main gate and talk to the Expert Trials woman. Select "Operation Homecoming", and go to the Airship Landing. Fly the airship to Cetme, then travel towards the mountain range and enter the cave. Move towards Bazz and free it. Afterwards to the Dominion woman at the very back. She will give you a task at Silent Key to kill Iron Giants. Accept it, then travel south to Silent Key. Note: Consider using a Chocobo to avoid all the Behemoths surrounding the area. Silent Key is the crashed airship on the peninsula. Enter it to find the seven Iron Giants that you must defeat. There are three in the main corridor, and four more with each guarding a trigger. Hit all four triggers and eliminate all seven Iron Giants as well as Red Giants. You will now be able to access the bridge. You can now get the airship "Setzer".
Start a mission. You will be asked to choose your party. Every mission has a unique set of primed cadets that are identified by a gold background when selected. Make sure all your party members have that gold background on their name. The number of primed cadets can range from one to at least five. Make sure that your active and reserves are all primed.
Complete the indicated task to get the corresponding Eidolon.
The following enemies can be encountered at the listed locations.