Though all of these were covered in my complete playthroughs, there was no how or why, nor any commentary. This is a shortened explainer for all the easter eggs and secrets, as well as collectibles, that can be found in the demo.
Edit: The only thing I think I could've been clear on is the Meteorain plate on top of the magazines in the second dream. It only triggers if you get gold plates enabled by that point, in other words if you collect 250 crystals by then. This is absolutely do-able but if for some reason you missed some and can't find anymore, no worries, you can get Meteorain again near the end of the third dream.
Bronze Plates: 25 Crystals required to unlock
Silver Plates: 100 Crystals required to unlock
Gold Plates: 250 Crystals required to unlock
Platinum Plates: Defeat the final boss to unlock
Warp Jumps: Carbuncle gives you this ability after two minutes into the boss fight. You can still do minimal warps prior to this but can't climb the castle until getting the full ability from Carbuncle. If you kill the boss too quickly, just re-do the boss fight and whatever time was left counts down until he gives you the full ability. (Though keep in mind it doesn't really matter before your first victory because the platinum plates on the top balcony don't unlock until the boss is beat once anyway)
See more Final Fantasy XV content at: http://bit.ly/2hSOeG9
➥ Follow me on Social Media:
https://www.facebook.com/AdventYT
https://www.advent-seph.tumblr.com
https://www.twitter.com/adventseph
https://www.vine.co/adventseph
https://www.instagram.com/adventseph
https://www.dailymotion.com/user/advent-seph
https://soundcloud.com/hasan-chattha
In Love by A Himitsu https://soundcloud.com/a-himitsu
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
https://creativecommons.org/licenses/by/3.0/