Glad That’s All Over! Achievement
Defeat All Shapes
To earn this achievement you must “Defeat All Shapes”, or rather defeat all forms that Marlo changes into (Ice, Slug, Cat, Shark).
To defeat the Ice form, grab the Hair Dryer (located in the Bedroom, on the floor, leaning up against the right side of the Dresser) and the Batteries (located in the Kitchen, on the counter to the left of the Salt. Then use the Batteries on the Hair Dryer and then use the Hair Dryer on Marlo while he is in Ice form to prevent Marlo turning into an Ice cube again.
To defeat the Slug form, grab the Salt (located in the Kitchen, on the counter to the right of the Batteries and the left of an apple?), then grab the Empty Glass (located in the Bedroom, standing on the end of the bed) then use the Salt on the Empty Glass in your inventory (to obtain the item Glass with Salt). Then head into the Bathroom and use the Glass with Salt on the Sink to obtain the item Salty Water, lastly use the Salty Water on Marlo while he is in Slug form to prevent Marlo turning into a Slug again.
To defeat the Cat form, grab the Spray Bottle (located in the Bathroom, on the end of the bath, at the opposite end of the taps) then use the Spray bottle with the Sink to fill it up. Then use the Spray Bottle on Marlo while he is in Cat form to prevent Marlo turning into a Cat again.
To defeat the Shark form, examine the Photo of Marlo and his Dad (located in the Bedroom, on the right side of the Dresser, opposite the Photo of Linda), when zoomed into the Photo, “Use” the Photo to reveal a secret compartment and grab the Key. Then travel to the Living Room and use the Key on the Boxing Gloves (located in the Living Room, on the shelves to the right of the TV, on the top shelf, above the Stereo). Then use the Boxing Gloves on Marlo while he is in Shark form to prevent Marlo turning into a Shark again.
Once all 4 personas are defeated, this achievement will pop.