To summarise all the solutions and comments I will make an all inclusive one.
If you fall off a cliff or into any water, or get killed by an enemy then you will not get this. If any of these occur then you should reload your save which will stop the game from counting your death.
According to the guide post by MetalGeekMark, you do not need to get the QTEs to get this. If you miss one you can keep playing. I have not tested this myself, but he has had others confirm it.
Obviously playing on the easier difficulties will help, but the game is easy enough that you shouldn't need to. The easiest points to die is falling which is the same on any difficulty
There are some cheats which will make this easier:
Infinite Chi - Down, Right, Left, Up, Down
Invulnerability - Down, Down, Right, Up, Left
4x Damage Multiplier - Up, Down, Up, Right, Left
For clarification, I am sure I just reloaded the save on death and still got this, but it has been over 2 years so can't confirm if it was just a reload or a full quit. Apologies that I can't confirm further.