a player said they checked the shop and these are all items available for Soma at the store after beating Normal, most of them carry over for Alucard. (note these are shop items, there are hundreds of more stuff to find in the castles.)
ITEMS
Potion
/High Potion /Super Potion /Mind up /High Mind up /Mana Prism /Remedy/Uncurse Potion/Anti-Venom
WEAPONS (Soma and Alucard)
Long Sword / Damascus Sword / Gladius/ Hrunting/ Joyeuse/ Laevatain/ Claymore /Great Sword
Dainslef/ Estoc/ Combat KNife/ Axe /Battle Axe /Great Axe /Blunt Sword /Katana /Kunitsuna/ Lance
Trident/ Cestus / Morning Star/ Handgun/ Silver Gun/ RPG
HEAD
Glasses/Bandana / Thick Glasses / Ballroom Masque / Sunglasses / Combat Beret / Traveler's Hat
CHEST
Casual clothes/ tailcoat/leather plate/ copper plate/ justaucorps/ surcoat / silver plate /
mirror cuirass
LEGS
Sandals/Engineer boots/Iron Leggings
BACK
Cape/Hero's cape/ cloth cape/ traveler cape/ assassin's cape/ elven cape
ACCESSORIES
Pendant/ Lucky Charm/ Pearl Ring/ Crystal Necklace/ Power Belt/ Flame Necklace/ Blessed Ring/ Immunity Ring / Black Belt/ Soul Eater Ring
the RPG is said to be Soma exclusive, They've been saving up all day trying to afford it. It's the most expensive Item they seen so far; three times the cost of the second most expensive.
They have yet to beat it on Hard and currently they are getting their ass kicked.
More info people have found!
Treasure Chests: Myriad treasure chests can be found throughout Castlevania. The type of chest determines what sort of helpful item you’ll find inside, from health-replenishing food to rare weapons. In Co-op Mode, you receive items from the chests your allies open, too.
Skeleton Form: If you perish in Online Co-op Mode, a grave will appear where you died, but you continue to fight in skeleton form. Skeletons have limited abilities and cannot use items. If your whole team is reduced to bones, it’s Game Over.
Reviving: Use Water of Life to revive an ally who has been reduced to skeleton form. In online Co-op Mode, Water of Life can be found in blue treasure chests, but only the player who opens the chest receives it. Any unused Water of Life will be returned at the end of the chapter.
Mastery: Use the same subweapon continually and your mastery of that subweapon will increase, powering it up over time. As characters gain mastery of subweapons, their base weapon stats will grow in kind.
Soul: Any of a number of enemy abilities which are sometimes released in spirit form at the moment of a foe’s demise. Souls can be loosely grouped into three categories:
-Bullets: You cans et up to four Bullet Souls, which are activated by holding the Hunter Skills button and pressing up, down, left or right on the directional pad.
-Guardians: Once you have a Guardian Soul equipped, you may use it with a press of the Personal Skill button.
-Enchantments: The power of an Enchantment Soul is harnessed simply by equipping it.
Dark Magic: Spells which are mastered by collecting magic scrolls. You can set up to four types of Dark Magic, which are activated by holding the Hunter Skills button and pressing up, down, left or right on the directional pad.
Martial Arts: Physically demanding skills which are mastered by collecting martial art scrolls, and performed using a combination of the directional pad and other buttons.
Bound Spells: Magic acquired by locking projectiles and other enemy spells within the pages of the Book of Binding. If you succeed, the magic becomes your own. You can set up to four types of Spells, which are activated by holding the Hunter Skills button and pressing up, down, left or right on the directional pad.
Glyph: Magical sigils which appear when adversaries cast magic; by absorbing these symbols (holding down the up button), you can sometimes learn their magic. You can set up to four Gylphs, which are activated by holding the Hunter Skills button and pressing up, down, left or right on the directional pad.
Magnes: A Glyph which grants Shanoa extra mobility using the Personal Skill button. Press the button while near a magnet to attach to it. Next, press the directional pad opposite your destination to build up tension. Lastly, release the button and you will spring back the other way at rocket speed.
Dual Crush: In Online Co-op Mode, if you and another player are near each other and certain conditions are met, you can press the Confirm action button to signal the other player that you want to execute a Dual Crush. If the other player pressed the Confirm action button within the time limit, you will join forces to perform this powerful move.