All these quests are optional but you will most likely be able to get only one ending if you miss most.
Apartment sidequests Edit
Adopt a cat Edit
How to: There's a stray cat in front of the Hospital, in the City. Approach him carefully until you can interact with him and give him a Tin of Cat Food (received from The Director sidequest "Sleepy Cat comic"). The cat will eat and disappear. Now go in front of your apartement in the street, on the left side of the road. The cat should appear here as well (if he doesn't, sleep and come back), approach him carefully and give him another Tin of Cat Food. Go back into your apartement and you should see the Cat by your window. Use the "give" option when facing the window and the Cat will enter and stay in your apartement.
Giving your cat more food after adopting the cat will give you a better relationship with the cat. Giving the cat one Tin of Cat Food after adoption (a total of four) will make you able to pet the cat, and another Tin of Cat Food will cause the cat to sleep with you in bed.
Award: A feline friend for your apartement. Increases Mental Health score?
Get water Edit
How to: Find the bucket in the basement and use it on the leak in your apartment (room is on the right).Then drink one bottle of milk to get an empty milk bottle. Now check the bucket to get a bottle of water.
Award: Ability to make Coffee, feed Chuck, free drink for You;
Feed Chuck Edit
How to: Collect water with an empty bottle and talk to Chuck.
Award: Increases Mental Health score?
Free Food (Supermarket) Edit
How to: Visit the Supermarket in the City every day, kill or avoid the 2 Thin Men inside the shop and go to the far right of the screen. You will find a box with food in it. The box is replenished once a day with random food items. Rarely it will also contain Flares or Handgun Rounds as a bonus.
The Director Side-quests Edit
Find and bring 5 Sleepy Cat comics to The Director Edit
How to: Find the Sleepy The Cat comics scattered throughout the city.Award: 1 Tin of Cat Food for 1 Comics you bring back.
Hank Side-quests Edit
Find a cure for Hank Edit
How to: Collect the Health Tonic throughout the world
Award: 1 clip in exchange of 1 Health Tonic you bring. Increase Mental Health
Find Blue Pills for Hank Edit
How to: Collect and bring him Blue Pills. Blue Pills are available for free in the sink, check the bathroom every day to get more pills.
Award: He gives 10 bullets (1 clip) in exchange of 1 Blue Pill you bring. Decreases Mental Health score?
How to: This side-quest is only available in The Director's Cut on a second play-through. After completing the Adopt a Cat side-quest (see above), give your cat all 5 tins of catfood. Offer it the Cat Plush. You will receive the Cat Key in return. Use this to open the door with a paw-shaped keyhole in the hospital.