Resident Evil

This achievement is for the first Stone & Metal Object, which is obtained after defeating the Crimson Elder. In order to reach the Crimson Elder (he is referred to as the V-ACT Prototype 1 and Crimson Head Prototype 1), you need to obtain the Four Death Masks. (see below for info on obtaining them). Afterwards, you simply need to place each on the stone faces until the Coffin drops and fight the Crimson Elder. When he falls, pick up the Object from the coffin and the achievement should pop.

Here are the Death Masks and how to obtain them:
 

• Mask with No Eyes
  • Requires Chemical, found on East-Wing First Floor passed the Cerberus Corridor and at the hallway outside the shotgun room. Head outside the metal door with a Lockpick or Old Key (depending on character).
  • Requires Armor Key which is obtained in Death's Corridor (the third-floor hallway with the spinning-spike armor trap) and require the Imitation of a Key from the outside balcony above the West-Wing's Serum Save Room.
  After you have the Armor Key, head to the the Serum Save Room and passed it to a locked door that requires the key. Move down the long hallway passed the windows and you'll come to the Greenhouse. Use the Chemical in the water pump and turn the pump on Red to kill the tentacles (do not turn it the other direction or you'll waste five green herbs on any difficulty)
• Mask with No Mouth, Eyes or Nose - Requires Armor Key, see Above description. After obtaining the key, make your way to the U-Corridor on the East-Wing Second floor from the Main Hall. The center metallic set of doors leads to this puzzle. Simply push the upper-right armor first, then the bottom left and finally the bottom right. Once all are in place, interact with the center pedestal to open the bars. Do not press the button before the armors are in place or a deadly gas will fill the room. Examine the box you obtain and solve a quick puzzle (press the half-heart piece on each side) to get the mask.
• Mask with No Nose - Requires Armor Key (see above) and Shield Key.
  • In order to obtain the shield key, you need to have the Sheet Music and then the Moonlight Sonata book, as well as the Wooden Emblem and Golden Emblem.
    • The sheet music is located on the Second Floor East-Wing, in a room off the U-Corridor (first door on the right if entering from the main hall). Head passed Richard here and through the hallway to a door on the far left. As Chris, you'll have the lighter already but if you're Jill you will need this from the Study which is also located off the U-Corridor (last door at the end). With Lighter in hand, light the candle on the table and then push the cabinet situated on the opposite wall of the entrance to find a hidden room. There may be a zombie in here, so lure him out first then go in to examine the dresser to find the Sheet Music.
    • Return to the Dining Room and grab the Wooden Emblem from above the fireplace.
    • Next, go to Kenneth's Corridor. Heading towards the elevator, the last door before a turn requires you to unlock with the Armor Key. Inside is a piano, move passed the Piano to another cabinet near the back you can push for the rest of the music. Combine the item and use it on the Piano. As Chris, Rebecca will come in and you have to let her play for awhile to learn the music (if Jill, she'll play it automatically). Leave and travel the mansion for a bit (possibly going for another Death Mask), preferred if you go all the way to the U-Corridor and head back...then she'll be able to play the song correctly. Afterwards, a wall will move up and you can get the Golden Emblem. Replace it with the Wooden Emblem and return to the Dining Room, using the Gold Emblem here.
    • In order to solve the puzzle on the Grandfather clock, simply move the Large Hand twice to the left. Then select "No" to stop turning, the clock will tick and move to the side revealing the key.
  With Key in hand, go to where Richard is found and through to a door above some short steps. Open it up and head inside. You will encounter Yawn here but the mask itself is in the far left corner. You do not have to fight Yawn if you do not wish, but it's recommended for future playthroughs as well as an achievement if you force his retreat.
• Mask with No Mouth - Requires Armor Key (see above). Head to the First Floor East-Wing and either go through the weakened doorknob door or go through the Cerberus Hallway from the Art Room and Main Hall. After you reach the lobby outside Spencer's Office, go into the door on the far left opposite a small hallway.
  • The puzzle is easy to solve. The first picture you see hit the button until it glows another color, then run around the other two and to the opposite side of the wall. Hit the two pictures from this side, then the large picture of a woman at the end (the crows won't attack you unless you fire a weapon). The wall will go up and the final mask will be there.

This achievement is for the first Stone & Metal Object, which is obtained after defeating the Crimson Elder. In order to reach the Crimson Elder (he is referred to as the V-ACT Prototype 1 and Crimson Head Prototype 1), you need to obtain the Four Death Masks. (see below for info on obtaining them). Afterwards, you simply need to place each on the stone faces until the Coffin drops and fight the Crimson Elder. When he falls, pick up the Object from the coffin and the achievement should pop.

Here are the Death Masks and how to obtain them:
 

• Mask with No Eyes
  • Requires Chemical, found on East-Wing First Floor passed the Cerberus Corridor and at the hallway outside the shotgun room. Head outside the metal door with a Lockpick or Old Key (depending on character).
  • Requires Armor Key which is obtained in Death's Corridor (the third-floor hallway with the spinning-spike armor trap) and require the Imitation of a Key from the outside balcony above the West-Wing's Serum Save Room.
  After you have the Armor Key, head to the the Serum Save Room and passed it to a locked door that requires the key. Move down the long hallway passed the windows and you'll come to the Greenhouse. Use the Chemical in the water pump and turn the pump on Red to kill the tentacles (do not turn it the other direction or you'll waste five green herbs on any difficulty)
• Mask with No Mouth, Eyes or Nose - Requires Armor Key, see Above description. After obtaining the key, make your way to the U-Corridor on the East-Wing Second floor from the Main Hall. The center metallic set of doors leads to this puzzle. Simply push the upper-right armor first, then the bottom left and finally the bottom right. Once all are in place, interact with the center pedestal to open the bars. Do not press the button before the armors are in place or a deadly gas will fill the room. Examine the box you obtain and solve a quick puzzle (press the half-heart piece on each side) to get the mask.
• Mask with No Nose - Requires Armor Key (see above) and Shield Key.
  • In order to obtain the shield key, you need to have the Sheet Music and then the Moonlight Sonata book, as well as the Wooden Emblem and Golden Emblem.
    • The sheet music is located on the Second Floor East-Wing, in a room off the U-Corridor (first door on the right if entering from the main hall). Head passed Richard here and through the hallway to a door on the far left. As Chris, you'll have the lighter already but if you're Jill you will need this from the Study which is also located off the U-Corridor (last door at the end). With Lighter in hand, light the candle on the table and then push the cabinet situated on the opposite wall of the entrance to find a hidden room. There may be a zombie in here, so lure him out first then go in to examine the dresser to find the Sheet Music.
    • Return to the Dining Room and grab the Wooden Emblem from above the fireplace.
    • Next, go to Kenneth's Corridor. Heading towards the elevator, the last door before a turn requires you to unlock with the Armor Key. Inside is a piano, move passed the Piano to another cabinet near the back you can push for the rest of the music. Combine the item and use it on the Piano. As Chris, Rebecca will come in and you have to let her play for awhile to learn the music (if Jill, she'll play it automatically). Leave and travel the mansion for a bit (possibly going for another Death Mask), preferred if you go all the way to the U-Corridor and head back...then she'll be able to play the song correctly. Afterwards, a wall will move up and you can get the Golden Emblem. Replace it with the Wooden Emblem and return to the Dining Room, using the Gold Emblem here.
    • In order to solve the puzzle on the Grandfather clock, simply move the Large Hand twice to the left. Then select "No" to stop turning, the clock will tick and move to the side revealing the key.
  With Key in hand, go to where Richard is found and through to a door above some short steps. Open it up and head inside. You will encounter Yawn here but the mask itself is in the far left corner. You do not have to fight Yawn if you do not wish, but it's recommended for future playthroughs as well as an achievement if you force his retreat.
• Mask with No Mouth - Requires Armor Key (see above). Head to the First Floor East-Wing and either go through the weakened doorknob door or go through the Cerberus Hallway from the Art Room and Main Hall. After you reach the lobby outside Spencer's Office, go into the door on the far left opposite a small hallway.
  • The puzzle is easy to solve. The first picture you see hit the button until it glows another color, then run around the other two and to the opposite side of the wall. Hit the two pictures from this side, then the large picture of a woman at the end (the crows won't attack you unless you fire a weapon). The wall will go up and the final mask will be there.