Yes, Yes, and YES!!!
This game is AMAZING!!
I thoroughly enjoyed it ...
In a similar vein to the developer's previous games, Amnesia is an exploration-based adventure game played from a first-person perspective. The game retains the physical object interaction used in the Penumbra series, allowing for physics-based puzzles and interactions such as opening doors and fixing machinery.
In addition to a health indicator, Daniel's sanity must be managed. Being in darkness too long, witnessing unsettling events, or staring at monsters for too long will reduce the character's sanity. As the sanity level decreases, visual and auditory hallucinations occur and the player more easily draws the attention of monsters. Light sources help restore sanity, and in the bowels of the castle the player character may use tinderboxes to light wall-mounted candles, or deploy an oil-burning lantern found near the beginning of the game. However, the number of tinderboxes and the amount of oil in the game are both limited. Standing in a light source also makes the player more easily noticed by monsters. The player must find a balance between the amount of time they spend in light and shadow. Sanity is fully restored once Daniel completes an objective or progresses the game's story. It may also be restored by staying in the shadows until Daniel passes out, but this leaves him extremely vulnerable to any nearby monsters.
If a monster spots Daniel, it will chase him until he's out of sight. Daniel's only option at this point is to flee, as Amnesia does not give the player access to weapons. Players must find hiding places or barricade doors with rocks, chairs and other obstacles; unfortunately, monsters are very capable of tearing down doors in their path and kicking obstacles out of the way, and move extremely fast once they have spotted their prey. Players can also choose to hide Daniel in the shadows, at cost to sanity. Monsters who lose sight of Daniel will search for him for a time, but will eventually leave and vanish. At several points in the game, they are required to advance, as they will tear down a problematic obstacle in their path.