Dark

Cover dashing / cover hopping

 * This a technique for moving really fast when near walls. All you need is continuously spam the button for sticking to cover.

Shadow Kill enemy clipping

 * It is possible to get to the other side of a wall, by pushing enemy past the wall by trying to continuously feed on him and then using a shadow kill at a sharp angle to finish him off.

Crouch hovering / slow-falling

 * It is possible to significantly reduce falling speed by continuously crouching and standing up when falling (found by )

Various minor stuff

 * A good idea might be to bind skip to Mouse Wheel and use it to skip cutscenes. Similarly it may be a nice idea to bind cover to mouse wheel as well to maximise speed of cover dashing.

Chapter 0 - Sanctuary

 * The only character at the end of a level that you need to talk to is Tom and activate Tutorial.

Chapter 0 - Tutorial

 * Probably nothing, just running and proper usage of abilities

Chapter 0 - Salvation

 * Probably nothing

Chapter 1 - Harding Museum

 * Clipping through security door at the beginning of the level doesn't work, as you end up being stuck. Unless a way to clip more freely is found, going to a security door and using a PC (in cutscene) is the only way to progress for now.

Chapter 5 - Cryogenic

 * - skips vast majority of bullshit and level... but it's kind of bullshit to do. Also not actually timed, might save more than 2 min, might save less.