ACHIEVEMENT - HOW TO UNLOCK Alone in the Dark - Beneath the arthropod. Altitude is Attitude - Exploration off the ground. Backtracking - Ride the crates. Climbing the Cog - Don't pull the lever just because you can. Ding! - Running off will get you nowhere. Going Up - Don't let gravity keep you down. Guided by Sparks - The crate is key. It's Stuck - Prepare a dry landing. No Point in Dying - Complete the game in one sitting with five or less deaths. Under Ground - Vertical passageway. Urban Exploration - Involves heavy lifting. Where Credit is Due - Perseverance has its own reward. Wrong Way - That's not right.