You start the first chapter of the game as Sam. After reading the note on the gate you will learn that it is damaged. Walk through the wall on the left. You can do it carefully or fast. This time it won't matter, falling from such altitude will be harmless.
You will meet a squirrel - don't move in order to feed it (you will have other tries - you must do it). However, it's not important. After a while you will notice an information board, and the guidance totem #1 underneath it. Before the house you will find a backpack: you can close it or check it - it will impact one of the butterfly effects (Any of Your Business) - the events that seems to be irrelevant, but that will later impact the fates of the characters. This time it's not a very important choice.
Go with Chris to the shooting range. You will notice a wanted poster on your way - one of the clues. At the range, you must aim and destroy the marked targets. The squirrel might cause a butterfly effect (Rats With Bushy Tails) - it is recommended not to kill it. Otherwise, Sam will get hurt and it will make further actions harder. After playing, enter the station and wait for the trolley.
Above you will participate in few conversations that won't matter. Only one of them is related to a new butterfly effect (The Soul of Discretion), when Ashley will notice Mike through the scope and can mislead or convince Matt to watch. After that, a scene with Jess and Mike will occur - a snowball fight. It's the first phase of the relationship between them, during which you will make them kiss. The whole relationship will lead to a slight difference when they will reach the house. Depending on the relationship, Jessica will have all clothes, won't have the jacket, or she will be wearing only her underwear.