"Anna" is an adventure game designed to analyze what the player does and react around his behavior. It features three ending according to how much the character has gone deep into madness. The more you play, the more you find, but to really discover everything, you'll have to lose yourself. With the game, you'll also get the main character's notepad, giving you more insights on the plot, and the original Soundtrack.
Poor controls, nothing scary outside of the odd ambiance and it seems like it requires multiple playthroughs since the first ending is nothing.
To me those are enough to turn me off of this game after one play through.