Apocalypse: Avoiding taking damage from poison tiles
In dungeons you will occasionally encounter pathways that are filled with poison. You may consider buying the app that reduces and eventually eliminates taking damage from poison, but, this is a much more easy way of dealing with them. Simply mash your weapon swing button (X) and you will move a step forward, but take no damage from poisoned terrain. Obviously this works only in dungeons and not on the world map.
Bring Over Demons
Normally when you play a New Game+, all of your party's demons are erased and, as far as your initial party is concerned, you must start anew. However, if you have a demon being used for StreetPass at the time you defeat the final boss, this demon will not be deleted when you play a New Game+, allowing you to bring over super-powerful demons to your new game.
Fellow Difficulty
Die twice and on the second time, you will receive a program for your Gauntlet that will unlock an easier difficulty, the Fellow Difficulty. Note: You must pay Charon to revive in order for the mode to be unlocked. The game will not save death data if you simply reload without paying.
Horde Race Weakness
A fact not mentioned in the game is how the enemies of the Horde Race are somewhat weak to attacks that hit all enemies. Because Hordes are detected as being five enemies for the game's targeting system, despite sharing one unified set of statistics like HP and MP, you can use attacks that hit all enemies (such as Critical Wave, Mazio, Maragi, and Mabufu) to hit these Hordes multiple times. This technique is able to far exceed the power of your basic Attacks and numerous other Skills on many occasions by at least triple their norm, and is even more useful if you use a Skill element that the enemy is weak to.
Master difficulty
Successfully complete the game.
New Game+
Beat the game once.
Refill half of your team's HP/MP in battle with no cost
Normally when you hit on an enemy's weakness your respective player/demon will gain the status "Smirk". If you can accomplish this and retain the "Smirk" status for all four fighters before you run out of turns you will gain a free health and magic refill for each fighter of up to half of their respective HP/MP.
Saved game icons
Start any type of a New Game+ mode game. Four possible lights will mark your saved game file. They are unlocked by completing the following tasks. Note: The "Alignment" stat is hidden, and becomes greater the closer you are to Law and decreases the closer you are to Chaos.
Icon
How to unlock
Light #1 (green), Nothing Ending
Choose to become the True Messiah.
Light #2 (blue), Law Ending
Have an Alignment of +9 to +100 and complete the game.
Light #3 (white), Neutral Ending
Have an Alignment of -8 to +8 and complete the game.
Light #4 (red), Chaos Ending
Have an Alignment of -100 to -9 and complete the game.