Will use the movements keys for Pc as it was what i used.

basics
<- Light attack
down arrow, a heavy attack that locks you in place for a few seconds.
>- Block, with light attack becomes a parry.
^ Gun, if you shoot an enemy in a certain animation unique to each of them you will stagger it, allowing you to either use 4~5 light attacks (~75 dmg), 4~5 sprint attacks (~120-150 dmg), one heavy attack or a riposte that always deals 80 dmg.
Spacebar for dodge

advanced
Sprint with Shift, can be used along with light attack <- to do a running attack with medium damage.
Spacebar and then light attack for an uppercut dealing medium damage.

damage values before upgrades goes (low to high) Light attack (~10, 20, 15) -> Sprint attack (30), Uppercut (30) -> Heavy attack (40) -> reposte (80). (tested on 4th knight)

Enemy HP (ng): (Shooting opportunity for riposte)
Maids ~90 hp, Does a 3 hit combo (at the beginning)

Butlers ~130 hp, either throws knifes (stagger moment) or jumps up and summon flames when he slams down, falls down randomly for an easy riposte.

Gunslingers ~90 hp, (when he reloads) shoots up to 3 times?

Hysteria (Scissor woman) ~110hp, (when she screams) spin to win attack.

Cape ~60hp, Summons lightning (one hit kill instead of stagger)

Tentacle ~1hp, can't be shoot, flails around when you get near

Woodcutter ~130hp, single slash or jump attack (after he lands)

Demon gunslinger ~150hp, summons attacks when he bends back (stagger moment), energy wave by growing its eye.

(unknown stagger moments);
Tentacle Maid ??? strikes or summon tentacles.

Needle demon ??? aoe with needles in a circle stabbing inwards.

Demon Woodcutter, ??? Flips the screen around, can be blocked or Slam attack.

Immortal:
Lantern bearer, will release damage dealing fog.

Eye turret, summons flame around it.

Fleshy mass, summons fog when struck.

Black flames left behind from enemy attacks can be cleared by attacking, don't use sprint attack as you often get hurt doing so.

First knight Len (~900 hp):
Located directly to the north

Attacks:
Stagger moment, when she summons blue bombs

Second knight Gray (~900 hp):
Located in the Church to the west

Attacks: Lifts his hand and a lightning bolt strikes down, Charges forward and leaves a flaming trail, a triple slash combo. later on summons a large sea of flames.

Stagger moment, can only be sword parried.

Third knight Hito (~900 hp):
Located on the roof 3rd floor north section

Attacks:
At certain hp intervals will disappear and snipe, can only be dodged with spacebar, blocking will deal full damage.

Stagger moment, when he reloads.

Fourth knight Sagarat (~900 hp):
Located in the library, east mansion

Attacks:
Light combo up to 3 hits often teleports after if you are far from him
At certain hp intervals (maybe 70%, 40% not sure) will split up to 3 max, each clone takes damage.

Stagger moment, when he teleports.

King Guileford (~1200 hp):
Located in the area behind First knight

Attacks:
He will use the knights signature attacks, summon blue lightning (Len), do a triple slash combo (Gray), throw explosives (Hito) and summon a red eyeball, can't be shoot during this one and it will cause an abomination to spawn in the arena that heals him.

Stagger moment: when he summons a big blue eyeball.

Optional boss Monolith (~1500? hp):
Located at the bottom of the crypt, Insanity required

Attacks:
Its sides opens up causing a big blue explosion, Shatters and does a big aoe, Charges up and does an energy beam going in a circle anticlockwise.

Stagger moment, ???

Tab to access inventory

there are 5 keys in the mansion leading to shortcuts, Noahs key blocks of an area while the other keys areas can be accessed without a key but a door will be locked going from them towards the main hub.

To gain upgrade materials:
-Kill Butlers, the lantern wearing enemy you encounter in the tutorial. There are a limited number of them as they don't respawn.

-buy them from an npc located on the upper floors left door. 3 stones at a time with an increasing price, at first 5000 vitae then +1000 for each purchase.

-Finally there is a very small chance for enemies to drop them.

Upgrades:
After you kill your first boss, npcs will move into your main hub and they increase:

Bullets permanently by 1 for each 1000 vitae.

Needs Vitae stones: Vitae stone cost increases the more upgrades a stat has (been to long so don't remember if it increases for all upgrades or just vials)

Vials (Healing item) Vials price increases as you gain more upgrades after a certain point with +1 stone requirement for each. (don't know how many stones need to be spent to reach this point though.)

HP: the painting in main hub increases Hp (+15)

Damage: you can increase damage (+15) by going up and left (door near priest)

Stamina: (+15) up and right

Vials: Before any boss kill Vials (+1) is located up, left, left ,left

Ammo: (+1) is down, left then first door, up, left, left.