Here is a comprehensive walkthrough of the game Illusion, accompanied by step-by-step instructions on how to achieve each ending in the game.
Just follow the tutorial for the first three rooms, it is linear and you can’t miss anything.
Note: You can fast forward dialogue and cutscenes by holding Space.
Head out of the room.
Go to the right and down as instructed.
Pick up the jump potion under the tutorial sign. Use it in the menu and cross the gap.
Pick up the acceleration potion under the next tutorial sign. Immediately use it and go through the exit.
Pick up the intercom on the table and move along as instructed.
Step on the button. Use the intercom from the menu to switch characters.
Cross the lasers and step on the tile. Switch back to Parr.
Step on the next button. Switch to Theia.
Cross the gap and interact with the terminal. Switch to Parr.
Cross the lasers and step on the next button. Switch to Theia and leave the room with both.
In the next room step on the button. Switch to Theia.
Move past the lasers on the bottom and step on the switch to the top right. Switch to Parr.
Interact with the terminal, then step on the button again. Switch to Theia.
Push the box past the lasers and onto the tile in the back. Leave the room with both.
In the next room step onto the button. Switch to Theia.
Go through the portal. Interact with the terminal and bring the box back with you. Activate the skybridge with the small terminal. Push the box onto the tile past the lasers. Leave the room with both.
In the next room step onto the button. Switch to Theia.
Pick up the potion on the table. Use it to cross the gap. Take the box, push it into the middle of the corridor that goes up and push it onto the tile. Ignore the button and leave the room.
Pick up and use the potion to get to the exit with Parr as well.
Head to Parr’s room and go to bed.
Back with Glen pick up the potion. Be fast, cross the first gap and run around the corner to cross the next for an achievement.
Now comes a maze. Check the terminal for the hint, first number is the row from the right, second number is the tile from the bottom.
In the next room you can pick up the potion if you want, but you don’t need it to solve the room.
In the red and blue tile room you do need the potion for the first section, make sure the orb gets stuck in the first section and the second one should be a walk in the park.
In the portal room, push the box on the button. Head through the portal and grab the second box. Push each box onto one of the next two buttons. Interact with the terminal and change the placement of obstacle 1 and 2. Then shoot.
In the dark room pick up the flashlight from the table. Head to the top first to step on the button. Then head back and to the right to interact with the terminal.
Now head back up and leave.
In the next room use the potion before stepping on the button.
Head to Glen’s room and go to bed.
Leave your room to meet up with your two friends, then follow the path for a bit and pick up the intercom.
In the first puzzle room you can pick up and use the potion, but it isn’t needed to get through the room.
In the next room I recommend not using the potion as the maze is easier to navigate by regular sprinting.
In the next room don’t use the potion to get an achievement. Just mind which tiles will be electrocuted next and the puzzle will be rather easy.
Head into the control room as instructed.
With Parr simply call Glen whenever there is an otherwise impassable obstacle and select the right option. Be careful not to accidentally reset the room.
In the next room step on the button then cross the gap. Prepare for a slow chase, time stands still while in the menu if you need to take a break. You can deactivate the red and blue tiles at the same time.
In the next puzzle room pick up the potion and save it for the second portion if you need it at all. Use the intercom to deactivate both colour tiles and move an obstacle up stepping on the button. After crossing the first set of coloured tiles you need to deactivate them again.
In the next room the terminal explains that the active buttons will change when you step on any button.
The solution for the room (starting at the first jump tile): Right, Down, Down, Left
In the next room circle around the walls in the middle to stall out the orb when you need to wait for any lasers to deactivate.
In the big puzzle room I suggest saving during the puzzle whenever you manage to push a box onto the corresponding tile.
Go to Glen’s room and go to bed.
Leave your room and interact with either the first or second door.
Head into the corridor and to the right.
After meeting the yellow furry head to the top left.
Interact with the door, then head back and talk to the yellow furry Ivan.
Enter the Chem Lab with the key.
In the big room go to the top right and head along the corridor to meet the pink furry and get the Warehouse Card.
Head back to the big room and head down left.
Interact with the card reader next to the first door and enter the warehouse. Interact with the glowing spots and pick up Three Coins and Reagent Bottle.
Leave the warehouse and interact with the vending machine to the left twice to obtain the Wardrobe Key. Then move along the path up into the library.
Pick up the Server Room Keycard from the trash in the cubicle down left. Pick up the toolbox from the cubicle to the top.
Leave the library, interact with the card reader of the door to the right and enter the server room. Head right and interact with the pc. The answer can be found on a computer in the library, but you might need to trial and error the order a little.
Computer Code: 20211029
Turn off server number 8. Then go and repair the server.
There’s a manual on the table explaining the server repair puzzle. Interact with the previously electrified server and use each option in the order of the manual. Pliers, Connector, Container Packing and Tape.
Turn on the server again and head back to the library. Interact with the computer in the cubical to the top, get the telephone number from document 2 and unlock the cabinet. Pick up the Chem Lab Keycard.
Head back to the big room and head down left. Use the card reader on the second door and enter the Chem Lab.
Go to the top right and open the Poisonous Substance in the small cabinet next to the table for an achievement.
Pick up the Cylinder from the left cabinet on the top. Pick up the Beaker from the blue basket on the right. Use the closet key to open the upper closet and put on the lab coat. Now pick up the Nitric Acid from the small cabinet next to the table.
Follow the instructions on the sheet of paper on the left big black table.
Go to one of the wash basins in the middle of the big black tables and clean both containers.
Use the big machine in the top right to measure. Choose the first option. Then choose option 1 and input 60. Choose the option that is left over and input 40.
Put the lab coat back into the closet. Now leave the Chem lab and return to the big room where Evan is.
Head to the top right and interact with the first door. Use the sulphuric acid to get into the office.
The books and paper are hints to the computer code for the computer to the top right.
Computer Passcode: 2422
The birthday is needed again to figure out the passcode to the computer to the bottom left.
Computer Passcode: 20211024
Get the encrypted file permission for the reference room aka library. Head back to the library and interact with the computer in the upper cubicle. Choose office data access and pick up the Red Keycard from the storage cabinet on the right.
SAVE! This is where the story can Branch.
Branch DON’T Help Amy
There is only one Ending you can get from this Branch, which you can also get by simply letting a timer run out at the end!
Return to Ivan and give him the keycard.
Leave the lab area and head back to the room where you first met Ivan and pick up the Fuse that he dropped.
Go back into the lab area and head to the elevator in the back of the area, which is accessible by heading along either corridor. Put the Fuse back into the voltage box to the top left next to the elevator and enter it.
Branch Help Amy
Return to the big room where Ivan is, read the paper on the desk and call the number to get the code for the safe.
Telephone Number: 34122
Safe Code: 13010
Head down right, interact with the card reader next to the third door and enter the admin’s office.
Pick up the Screwdriver from the table next to the computer.
Return to the storage room and interact with the vent. Use the Screwdriver and enter the vent.
Interact with the pink furry and get the Sewage Keycard.
Head back out of the lab area and to the right.
Pass the laser corridor and head further right until you are in a darker corridor. There go through the door to the top for an achievement.
Go back into the corridor and interact with the card reader next to the door that has Food written on it. Use the Sewage Keycard and enter the room. Pick up the doll, this will also net you an achievement.
Head back to the pink furry Amy and give her the doll.
Now go back to the room where you met Ivan for the first time and interact with the card reader before interacting with the terminal.
Head to the elevator, put the Fuse back into the voltage box to the top left next to the elevator and enter it.
After exiting the elevator go right.
SAVE in case you mess up for one of the achievements.
Head to the top and into the first room. Pick up the Storageroom Key from the table.
Go into the storage room, which is right next to this one and get the Silent Shoes.
Go back down the corridor and take out the guard. Pick up the Keycard from him.
I recommend saving regularly after successfully taking out a guard without being found.
Use the Keycard to go into the next room and take out the guard. Deactivate the security lasers on the pc, you can find hints for the password in the room.
Permission Password: 15272
Leave the room and move on into the area with the green tint. In the first room is a closet you can hide in if you get chased.
Head through the second set of doors and take out the two guards, be patient and hide to observe their pattern first.
Go through to the next corridor and to the right taking out the guards again, mind the boxes! This time there are six guards. The final one that stands against a wall can be safely approached from the side. Take out all six without getting caught for an achievement.
Head down and further to the right. Take out the two guards and continue to the right.
Interact with the card reader next to the door and enter the control room. Use the computer to turn of the lasers again. Move along to the orange area.
Take out the two guards in the first corridor to get the Hall Key. Head to the right for a reunion.
Move along the top right into the blue area and follow the corridor.
In the big corridor head through the middle to the right. Then escape the blue furry to the right.
Gather the terminal codes on the papers, then enter them in the corresponding terminals while avoiding the blue furry. Then escape to the right again.
Terminal 1: 2124
Terminal 2: 4885
Terminal 3: 4092
Terminal 4: 8921
Back with the others talk to Ivan and Parr to break up the squabble. Leave the room and head back in the direction of the orange area. In the room with the stairs go down and left.
In the first puzzle room step on the button. Switch to Parr.
Cross the gap and switch on the bridge at the first terminal. Move on and use the second terminal to reset both boxes. Then push the normal box onto one of the buttons and step on the other. Switch to Glen.
Push the blue box along the path onto the blue tile. Leave the room with both.
In the next room pick up the potion and use it to cross the gap. Use the terminal to reset the blue box and push it onto the upper button. Go through the portal and activate the bridge at the terminal. Go back through the portal, reset the box and step onto the upper button. Switch to Glen.
Push the box through the portal and step through it. Switch to Parr.
Step onto the middle button. Switch to Glen.
Push the box onto the tile and go back. Switch to Parr.
Step onto the upper button again. Switch to Glen.
Go through the portal and use the terminal to reset both white boxes. Push each on the middle and bottom button. Leave the room with both.
In the next room interact with the terminal to the right and reset the blue box. Then step on the yellow button. Switch to Glen.
Cross the gap. Switch to Parr.
Step on the blue button. Switch to Glen.
Push the box past the lasers. Switch to Parr.
Step on the red button. Switch to Glen.
Push the box further. Repeat until the box is on the blue tile. Leave the room with both.
Switch to Parr and step on the button. Switch to Glen and leave the room. If you leave with Parr you’ll get stuck.
SAVE whenever you get a box onto the corresponding tile, so you can reload and don’t have to start over every time you get caught.
In the dream world follow the bits of path otherwise the room just loops.
Move on from the white area to the blue one and pass the lasers. Then move along to the yellow area.
In the living room area go left into Glen’s room. After waking up again exit to the living room.
Interact with the gifts by the tree and open them. Do the same with the big blue gift for an achievement.
Go to the front door to find it locked. Enter the bathroom to the left and interact with the wash basin multiple times until you get the Shelf Key.
Head back into the main area, interact with the shelf to the top and use the Key. Get the Door Key and use it on the front door by interacting with it and choosing the first option.
Move along the corridor and down to leave the building.
Outside head to the right. At the white stripes on the road go up into the forest park.
In the park head up. Enter the small building and pick up the Hook from the shelf by interacting with the glowing spot from the side.
Back outside from the middle head to the right and down. Interact with the left vent and use the Hook to get the House Key. Then head up and enter the house.
Interact with the wash basin to get another Key. Go through the next door with the Key.
Search around the place for five Shiny Crystals. They are in the glowing spots and rather easy to find, just be careful dodging the shadowy figures. SAVE inbetween picking up the crystals as you’ll be completely reset if caught.
Once you got them all head to the top right to progress.
Enter the villa and head up. Hide from the shadowy figures in the lockers.
Upstairs head up and pick up the Crowbar from the tool box. Then head through the second sliding door from the left to enter a hidden room and interact with the radio for an achievement.
Now go back to the entrance and open the glowing crate to get the Black Orb.
Head through the door and up. Put the Black Orb into the container on the table to get a Room Key.
Go upstairs and to the left. Go through the door using the Room Key.
Head along the path through the dream world, but after the many dialogue when you reach the door head further right to get a password.
Remember that you can push the medium sized cardboard boxes during the chase scene.
After waking up head down right to patch up your bruises and then up to the elevator.
Final Chapter and Endings
SAVE. This is another Branch in the story. You need Amy in the party for all of them. There is only one Ending when you don’t have her with you.
Branch DON’T Help Fire
Choose to use the blood packs for Glen.
Branch Help Fire
Choose to use the blood packs for the red furry.
Branch DON’T Get The Hidden First Aid Kit
Just move along the path.
Branch Get The Hidden First Aid Kit
In the orange hallway go up an through the double doors. You get the Keycard from the safe, which you got the password from in the dream world.
Safe Password: 72312
Leave the room and head back around to the terminal. Interact with it and go left, then interact with the Med Kit.
Now follow the path again.
Underground Sleep Forever
Don’t help Amy.
Don’t help Fire.
Don’t get the hidden First Aid Kit.
OR when you helped Amy let the timer run out.
One Furry Gone
Don’t help Fire.
Don’t get the hidden First Aid Kit.
Don’t get the hidden First Aid Kit.
Get the hidden First Aid Kit.