Here's all the stuff that's new this update!

Technical

• Squashed tons and tons of bugs. (Emil refused to eat them, however.) Updated the engine from Unity 4 to Unity 2017.
• Gave the game a graphical makeover, tons of shaders and models have been updated/cleaned up.
• Polished UI
• WeatherSync's Geolocator API has changed to geoplugin. We still use OpenWeatherMap for tracking weather.
• You can now specify Celsius or Fahrenheit for temperature display.
• For people who have trouble reading the boktai font, you can swap it to OpenDyslexic in the options menu.

Art

• The music has been refreshed. Other songs have been replaced: a remix of Battle Drive has replaced the old purification theme.
• Annie and Emil's portraits have been updated, and new ones have been added.
• Some older models have been updated too. (Annie and Emil now have actual chins, Boks look more Bokky, etc.)
• Camera post processing been adjusted for better colors.

Mechanics

• Added equippable weapons and gun frames. They can be obtained either via exploring or defeating bosses in their respective purifications.
• New magic system: Annie can summon various creatures to help her deal with the undead, while Emil can use transformation magic.
• Added tons of items: including fresh tomatoes, mooncakes, biscuits, healer, steak, and more.
• Purification no longer happens immediately after the boss fight. You must now drag the coffin outside to begin purification.
• Purification minigame for the daytime now resembles that of boktai1's. The night version has been changed too.
• Combat has been tweaked to feel less sluggish.
• Emil can now perform Zero Shift if you attack when a counter indicator pops up on the target reticle.
• Emil's parry move can deflect projectiles. Rolling and attacking at the same time allows for an alt-attack.
• New targeting system: you can now swap targets. Wall tapping/wall sneaking has made a return.
• Chocolate melting, except it melts in heat instead of sunlight.
• You can now reset a room using Dark Loans. However, you cannot yet take out a loan.
• But you should still repay what you owe :)

World

• The entire story has been heavily rewritten.
• The story's path will change depending on whether you play the game during the night/during the day.
• Added Folun, Voodoo Dolls, Skeletons, and other enemies to the world.
• The Wadjet Temple and the Ghost Town have had their layouts updated. Two Undead dungeons have been added.
• Small things in the world might change based off of moon phase too.

San Miguel

• The Solar Bank, Item Shop, Library, and Annie's house is open.
• There's a lot of new people to talk to while in-town.
• You can talk to Toasty to exchange Lunar Knights/Boktai DS passwords for rewards.