First decision takes place during the moment shown on the picture in Chloe's home. If you open the window, the bird will survive. Otherwise it will die.
Second decision is whether you will leave the bird nest uncovered after you take the photo in the garage. If you won't move the desk after taking the photo, you will receive the "You disturbed the bird's nest" option.
Choice: You disturbed the birds nest
The nest will be destroyed.
Joyce will know that Max is sniffing around in David's garage.
Joyce will send Max a message about the destroyed nest.
Choice: You didn't disturb the birds nest
The nest will not be destroyed.
Joyce will not know that Max is sniffing around in David's garage.
Joyce will not message Max about the destroyed nest.
Another important decision will be the method of opening David's locker. You can use the crowbar or enter the four digit code to the padlock. The code could have been found in the third episode of the game, when David's padlock was lying on the table. The code is 7171.
Max can also open the padlock using the key or a crowbar.
Another decision is related to the events of first episode. If you have saved Kate from the suicide and asked for Victoria and Nathan in the hospital, she will help you in identifying the Nathan's room number.
If Kate is dead, you will have to search for clues on the boards by the room doors.
Another decision will be whether you will motivate Daniel to go to the party in Vortex Club. To do it, you must talk with him about the "End of the World Party" and then encourage him by selecting the "Go to the party" option.
You will face another decision in the dormitory. You can draw something on Warren's plate or leave it as it is. Warren's room is marked with number 109.
Warren thanks Max for leaving the message.
Max will be able to kiss Warren in the restaurant.
Choice: No action
Max may not be able to kiss Warren in the restaurant.
Seventh decision is made during the hacking of Nathan's phone. You can enter the PIN which has been placed in Nathan's school documents or PUK which can be found on SIM card.
Eighth and last decision can be made during the party in Vortex Club. You can warn Alyssa again or completely ignore her suffering. If you won't be fast enough to warn her, travel back in time. If you help Alyssa, she will thank you for your help. If Max saves Alyssa for 4 times, she will dedicate her Robert Frost's poem.