Route for All Endings as it looks like, do this step

• Find The Hanged Ib in Hide and Seek
• Save the game in the 2nd slot after putting the bird in the cage

NOTE: these are the 2 routs for all endings, you can do this in reverse order but it is recommended to do the route 1 with Garry's death points

Route 1

• Kick the dummy's head
• push 2 dummies while running away
• kick the doll
• save the game on slot 3 before talking to Mary (it's important before selecting 2 options for "Welcome to The World of Guertena" because you won't have a back up to do "A Painting's Demise"
• choose 1 or 2 options (depending on which of the two endings you do)
• Garry must die in the dolls room
• if you reach "A Painting's Demise" or "Welcome to The World of Guertena" then load the game on slot 3 and do the same as before the conversation with Mary by selecting 1 or 2, depending on which ending you need to do now
• before entering the dolls room, save the game on slot 3, then do the same, Garry must die in the dolls room
• if you reach this 2 ending, load the game on slot 3, find the key and escape from the dolls room
• before you leave or take the lighter away from Garry, save the game on slot 3
• Ideally, do "Forgotten Portrait" at the beginning so you can reach the other 2 endings
• load the game on slot 3 and enter the black gallery
• do the ending "Ib All Alone"
• load the auto save and do the "Together, Forever" ending

Route 2

• do not kick the Mannequin's head
• do not push the dummies while running away
• interact with Garry's coat and choose 1 option and give it back
• After the blackout in Purple Area, choose 1 or 2 options
• Garry must die in the doll room and then Ib and Mary find Garry after entering (this is important for "Promise of Reunion")
• Find Garry when he wakes up, choose 1 or 2 options
• after burning the tangles, save the game on slot 2
• after burning Mary's picture, choose 1 or 2 options
• reach the end of "Memory's Crannies" and then load the game on slot 2
• after burning Mary's image, select option 3
• reach the end of "Promise of Reunion"