Major:
2 New Areas. Calamity Overlook and No Man's Land.
3 New Characters.
4 Sex Scenes.
Encyclopedia: Check this new book on the world map to keep track of every enemy, item, armor, weapon, skill and state you find in the world! (Note: Will not be filled in retroactively)

Achievements: Use the encyclopedia to complete 130 new achievements and earn rewards! (Note: Not all of them will be gained retroactively)
Puzzle Bosses: A challenge unique to the Calamity Overlook that'll have everyone busting their brain to earn awesome rewards.
Added tons of unique sprites for armors, accessories and states to avoid overlap. e.g. Red, Blue, White and Yellow Bangles/Bracers are actually their intended colour now!

Minor:
3 New Weapons, 8 New Accessories, 7 New Blessings.
Skill and Limit Changes:
Power Break and Magic Break nerfed from 25% reduction to 20%.
Lowered Enfire, Enfrost, Enthunder and Enwater MP cost from 8 to 4
Heavy Bolt and Net Bolt now push the enemy's turn back by 1 place on the turn order.
"Fully Automatic Bolts": Now has 4 fewer attacks. All attacks now hit but the damage varies to give similiar DPS. (Overall 33.6 -> 34 Power)
"Sunburst" has been moved from Ultimate Form to Holy Form and the spear count has been reudced from 9 to 6.
Ultimate Form, new Spell: Witch's Fury: "Power 8 Fire Damage to 3 Random Enemies. Inflcits Enfire and Imperil"
Ultimate Form, new Spell: Witch's Calm: "Power 8 Water Damage to 3 Random Enemies. Inflcits Enwater and Dispels Stat Buffs"
Celestial Form, new Spell: Rising Phoenix: Revives all fallen party members to full HP and deals Power 25 fire damage to all enemies.
Celestial Form, Hellfire renamed to Bifrost and is now an Ice spell that inflicts Frostburn.
Celestial Form, Diamond Dust renamed to Thor's Hammer and is now a Lightning Spell.
Celestial Form, Ultradrain renamed to Hyperbloom and is now water element.
Ray now learns "Buffsuna" at level 34. Old saves will automatically gain this ability visiting the world map (even if they're not level 34).
Ray's "Fury" spells now cause her to gain 6 TP when used.
Removed "Death" spell's TP cost and instead it's been given a 18% HP cost. Chance to kill has been buffed from 2% to 5%.
Making old Mythicals better:
Agni & Rudra New Effect: Attacks 4 times at half damage. (Power 4*8). +10% Counter Rate. +10% Critical Rate. Fire, Lightning, and Piercing Element.
Elven Legacy: Attack Replacement changed to "Rain of Arrows", hits all enemies thrice for 3*40% damage.
Nature's Harmony: Additional Effects: +25 TP per Turn.
Slimy Shield New Effect: +20% Max HP and MP. +10% Damage Resistance. Start battles with a barrier equal to 50% of your Max HP. 100% Water Resistance.
Beastmaster Bracer New Effect: +20% Max HP, +10% Damage Resistance. Gain 10% of your Current HP as a barrier every turn.
Ultimate Undies New Effect: +25% Max HP. +14% Magic Attack. +75% Counter Attack Rate.
Added "(Mythic Component)" text to all items that can be crafted into Mythical Weapons/Accessories
Bessie's default counter is now Certain Attack.
Ray's default counter is now Flare
You no longer automatically evade countered attacks.
Magic attacks can now be countered.
Attacks that hit multiple targets can now be countered.
You can no longer counter other counter attacks.
Stargazer's Starfall chance raised from 25% to 50%.
Added a shop and a blacksmith to the Elysian Colosseum reception area.
Added Common Doppelganger Weapons to Yasmin's shop.
"Delay" status reduced from -50% CTB Rate to -20%.
"Heavy Delay" reduced from -50% Agility to -25%.
Lowered the defense of all current superbosses, making it easier to hit damage cap.
Added cheat that lets you change Dante's name.
Added cheat that lets you automatically complete the Training Arena (+gives Rewards)
Fixes:
Completing the Pixie Punchout repeatable quest now passes the day.
Fixed Ep. 16 weapons being listed for Dante.
Fixed Mammon and Juliet being unlocked in the wrong order.
Fixed Dante returning if you game over in battles with just Bessie and Ray.
Fixed the Training Arena Shop not working if you've fully upgraded Mistral Village's shops
Fixed B-Rank requirement consistency from "top 100"/"top 300" to "top 200" across the story.
Historia's clothes no longer magically reappear at the end of "Advancement: Pumpkin Queen"
Added more buzzing 'z's to Molly's dialogue in Quiet Mountains.
Updated Cynthia's explanation of the Battle Shroom to be more accurate.
When using episode select past Acrila, Dante now correctly gains "Doppelganger" skill.
Pumq now properly counts towards your "Girls Slept With"
Fixed Episode Select not properly marking you as an outlaw for the purposes of the world map.
Added "6" to the answers of "How many times have you seen Ray naked" in Yulia's first quiz.
Fixed "Bloody Mess" dealing much less damage than intended on Ray.
Typo fixes.