Please note that there are of course other ways to play through the castle.
Also note that I will not add a walkthrough for the hero ending since there already is a guide for this.

The rules for being a hero/killer/coward are simple:
-The hero fights & slays monsters
-The killer kills (rather normal) people
-The coward runs away

Start:
1 through the gate
1 go through the door

Maid:
1 where is the library

Library:
2 go to the librarian
2 punish the librarian
3 shove the bookcase
1 kill him

Hallway:
5 go on

Room:
2 get some rest

Range:
2 go to the range
3 attack

School:
1 read the note
2 leave

Dorms:
2 F
2 have a better look

(go through the portal)

Witch:
1 attack
1 fake it

Necromancers 1:
2 accept

Treasury:
2 blow it up
2 use magic

Necromancers 2:
3 attack with both
1 hit him in the nuts
1 kill him

Start:
2 through the window
2 jump out of the window
1 go through the door

Maid:
1 where is the library

Library:
2 go to the librarian
1 apologise
1 look for the book
1 escape

Dress room:
1 go on

Theatre:
2 move on
2 open lock

Organ room:
2 play organ

Laboratory:
2 get out

Garden:
2 move on
1 escape

Alien:
2 talk
3 get out of there

Sleeping Room:
1 get some sleep
2 no way
1 ward off the whip
1 swordbreaker attack

(go through the portal)

Joe:
1 talk to Joe
1 play with Joe
2 go to the treasury

Treasury:
2 use the passphrase
2 give Neo a kick
2 kill Neo

Hallway 2:
1 leave through the window