Easter Egg: Sox The Robot
Early in the game when you wake up as Tyler there is a desk in the bedroom with an action figure on it that when checked he says "This is a figurine of Sox, a character from my favorite videogame." Sox is a robot from another great Quantic Dream game, Omikron The Nomad Soul.
Lucas being questioned
When you get stuck at the point where Lucas is being questioned and do not have enough mental health, intentionally do it wrong a few times and you should succeed.
You will be rewarded with 200 bonus points if You, after completing the game, watch all of the credits.