I got to the mission where you first fight the Heavy Ceph on a road leading to a hive and I got fed up with the nano catalyst bugs (not getting the stated amount, losing all of it on game restart) so I decided to start a new game on the hardest difficulty while Crytek fixes the game. Upon restarting, I noticed that I don't hear my own footsteps anymore nor do I hear either the jump, landing, the grunt on super jumping, or the power sound from doing a super jump. Not a game-breaking bug but kinda breaks the feeling of power when leaping over things. I'm going to try reinstalling to fix it.