[JILL SANDWICH TROPHY]
This one is probably the easiest of the five Achievements to get. In one of the upstairs room after opening a Sword Key Door, there should be an Auto Shotgun on the wall and a Hammer next to the inner door. Upon returning to that divider room with the Shotgun, the outer door will shut and lock, trapping you inside with the ceiling slowly lowering on top of you. If you grabbed the Hammer from next to the door, use it to smash down the outer door that leads to the hallway.
NOTE: Forgetting to grab the Hammer before entering the room WILL result in death as the inner door locks as well.

[V-JOLT POISON]
NOTE: This EE is not necessary to beating the Plant, but it'll definitely help.
STEP 1 (Unlocking the Room): In the second chapter, there is a door with a code-puzzle outside of Room 03. There should start out with being five of the nine buttons showing up as red. Mess with the buttons until all eight of the outer buttons are red and the center button is white. After this, all nine buttons will turn green and the door will unlock.
STEP 2 (Mixing the Chemicals): Inside this room, there will be a bunch of chemicals and a sink in which to mix them in. You need to get the Chemical Number to equal 24. To do this, for your chemicals choose Water, Purple, Red, and Blue. As the mixture will be 1 + 3 + 4 x 3, which will equal 24. Mix these chemicals to create the V-Jolt Poison.
STEP 3 (Poisoning the Plant): Upon completing the V-Jolt Poison, head to Room 002 (which you've already cleared by now) and descend into the facility-like area, remembering to bring the poison with you. Without dropping it into the water, bring the poison into the room where you shut off the alarm and place it inside of a pot with a plant inside of it. This will weaken the "plant" when you go back up to grab the Helmet Key.

[SAVING BILL]
STEP 1 (Getting the MO Discs): There are three MO Discs scattered throughout the Campaign, each has one of the three Access Codes required to reach the cell where Bill is being held. Here's where to find them;
FIRST DISC: The first disc can be acquired when returning to the Mansion in a small Library area. Turn on the light inside the room, push the statue into the center of the light, and a bookcase across from it will move, revealing the first disc.
SECOND DISC: The second disc can be acquired when entering the underground tunnels. After grabbing one of the medals, the Boulder will start to roll towards you. Avoid the Boulder, go back to it's point-of-origin, and you will find the second disc in the wall behind where it was.
THIRD DISC: The third disc can be acquired when in the underground lab. If you look around hard enough, you'll find it in the room with the computer where you unlock the electronic doors.
STEP 2 (Getting the Access Codes): With all three MO Discs in-hand, locate each of the three Disc Readers in the Lab. For each MO Disc you read, you get one of the three Access Codes.
STEP 3 (Opening the Cell): After acquiring all three Access Codes, beating the Super Tank Boss Fight, and looking through the Cameras, use the codes to open the doors leading to Bill's cell. The Master Key taken from the room where you killed the boss, you will be able to free Bill and he'll run back to the Saferoom.
NOTE: If you miss a single MO Disc during your playthrough, you will not be able to complete this Easter Egg. Also, if I misinformed you with the Third Disc location, let me know.

[THE SUPER HERB]
In one of the rooms inside the Mansion after getting the Helmet Key, there is a room with a deer head mantled on the wall. If you turn off the lights to that room, you'll notices a diamond-shaped item inside the deer head. Grab it, take it to the room where you took the Blue Diamond, and place it in the empty goblet on the left. The mechanism should rotate to reveal a yellow-colored Herb. This Herb will grant you 200 HP, making it just a little easier to survive Infected attacks.

Hi there man, i've found everything pretty much to the letter. Though as you suggested, the third MO Disk seems to have multiple spawn locations. I just found it on the desk next to the room that is closest to the safe room you first start in the Lab. Here, i've put up a screenshot of the exact place: https://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=2595820315

Cheers.

Unless my memory has died there's a Slenderman easter egg at the very start of the game.

You have to do... something, with the door behind the survivors and you will be jumpscared by Slenderman. I don't remember if you have to do anything before it unlocks, or if it's random if you can open the door... But it exists.

I hope I haven't gone crazy and that it actually does exist.

Wait, really? I never tried opening the front door after watching RE1 Remastered. XD

Though I haven't figured out where to take the V-Jolt Poison, I know how to make it. In Act 2, find the door with the keypad and make all the button light up red. When you do, they will turn green and the door will unlock. Mix Water with Red, Purple, and Blue.

Fun Fact; if you shoot the giant Spider that appears in Act 4, a ♥♥♥♥ TON OF TANKS will spawn. Be sure you're ready for that kind of fight before you kill it.

The code for the room you mix v-jolt in is in the bar room near the guardhouse entrance. Check the side of the pool table for the code. Also, you can unlock the dressing room door once you have the helmet key from plant 42. It's through the armor key door in the mansion main entrance. You can also find Chris's "Made in Heaven" jacket near the dressing room above the ink ribbon.

there's a yerba mate box and a calebash gourd near the first MO Disk reader (easiest one), a nod to the creators who are from Argentina

I found a yu-gi-oh deck in a part that looked like a bar. If you hit it you reveal pieces of Exodia, the more you hit it, the more of them drop, though i lost the deck at some point so i didn't complete it unfortunately

For those wondering what the door code for the Guardhouse to create the V-jolt, the code can be found in the bar room on the pool table by some pool balls spelling out 345. Put that in and the door should open.

Amusing easter egg - a book on Java programming language in bookshelf of mansion's "Itchy Tasty" room.

https://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=3423338083

Originally posted by UltraBloxX:

Amusing easter egg - a book on Java programming language in bookshelf of mansion's "Itchy Tasty" room.

https://steamproxy-script.pipiskins.com/sharedfiles/filedetails/?id=3423338083

bro this is just a half life 2 asset