These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Mark Of The Ninja
Alternative Character Interpretation: Azai. A man simply trying to protect his clan by giving them resources to replace the now extinct ink-flower even at the cost of his honor, or a ruthless leader who never cared about the honor in first place and will do anything to "protect" the clan?
Ora. Is she the last remnant of the Marked Ninja's sanity, or the last straw, the voice which finally drives him into madness?
The Hisomu Stalkers. Not only they cannot be stealth killed as they have keen senses (they can identify the Marked Ninja within a certain radius), are extremely agile, persistent, cunning and their attacks can kill the ninja instantly. They also need to be stunned akin the Elites but are far more agile and acrobatic meaning that physical combat will most likely result in a No Sell. The final trial of the game has you temporarily locked in a large room with three of these.
Fridge Brilliance: Use a Flare Bomb against enemies wearing Night Visions Goggles and you'll blind them, additionally they are immune to the upgraded Smoke Bomb.
Goddamned Bats: The Dogs. They can smell the ninja in the darkness (even hiding) and will start barking alerting the entire and room giving your position even if you try to move to another spot.
The Elites. They cannot be dispatched via normal means (trying to kill them before anything will result in a rather embarrassing Neck LiftNo Sell), you must either use the environment or a ninja tool to at least stun them before moving for the kill; AND if you fail the quick-time event they will snap out of it just in time to counterattack. The biggest problem is that there's no way to kill them in certain places unless you use up one of your very scarce attack items, otherwise you have to avoid them entirely.
Unless, of course, you want to go toe-to-toe with them. Hit them enough times and they will be stunned... but that tends to be a very bad idea unless they are completely and totally alone. Oh, and you lose points for raising the alarm.
Good Bad Bugs: There's a way to glitch through the floor if you kick into a wall while jumping. Your character is also able to "fly" by using the parachute cloth, then entering and exiting Focus mode.
Restarting Checkpoints during certain segments will result in guards lowering their more alert status, when they keep their guns with flashlights pointed at all times, into "calm", when they simply walk patrolling the area.
Player Punch: Ora isn't real? And you want me to kill her? Even if she really is just a hallucination, Ora has been the player's guiding voice throughout the whole game.
And if you do kill her, she dissipates into a flock of crows, and the scene changes to the Marked Ninja impaled on his own sword, having committed seppuku.
When you begin to make your decision, but before the execution, your target will be shocked, then lower his or her head in a combination of sorrow, disappointment, shame and acceptance of his or her final fate. Hesitate and it's possible to change your mind, but the individual remains in the same position. It prevents any real clear 'right' decision, as both characters will accept and respect your final judgment.