Gain the indicated amount of experience points to reach the corresponding level for Perks.
Complete the indicated task to unlock the corresponding perk.
In the Antenna area, climb to large antenna until you reach the zip lines. Then, travel to the mountains and search for a plant on one of the rocks (Screenshot). It will teleport you to a location where zombies are fighting plants (Screenshot) (Video).
After progressing, you will eventually find a guitar in your room at the Tower. You can pick it up and try to play, but it will sound awful. Later, during the during the "Siblings" mission in the school , you can find a "Guitar Lessons" book (Video). After reading the book, try to play the guitar again.
In Old Town, you will can find posters hidden around the area. Each poster starts a challenge that must be completed within a time limit. The reward for the poster challenges is 10,000 Survivor XP. They are located at the following locations. After completing all the poster challenges, Bozak will appear on your map. Get there to collect the Exploding Throwing Stars blueprint and kill the madman before escaping.
You can find a building named "Bites Motel", a reference to the film "Psycho", as well as the television series "Bates Motel" . .
Climb to the rooftop of the last building in the southwestern corner of Old Town . Jump on top of a strange looking pipe inside a chimney found there and try to pull it open (Screenshot). This will take you to a new area where you must jump on enemies to kill them (Screenshot). You also can smash a hidden brick with your head to reveal a hidden blueprint fpr the Pyza Suit which allows to to momentarily glide through the air (Video).
Go up to the Towers rooftop at the back . Interact with the checkers board to make a move. Leave the area by using the elevator. Sleep in the bed until morning. Take the elevator back up. Interact with the board again to make another move. After five moves you will win the game of checkers and receive the Sick Bomb blueprint (Video). "Sick" is the nickname of one of the game's lead level designers. Note: Instead of sleeping to advance the time until the next morning, you can just use the elevator to descend to the first level, run one lap around until the auto save indicator appears, then use the elevator again to return to the checkerboard.