I got a Steam code for this point-and-click horror adventure but I already have the game...

I got a Steam code for this point-and-click horror adventure but I already have the game. Instead I'll post the code here but ONLY once one of you solve my riddle.

I'm a member of nobility: a grand duke.
And I'm a primate like you, but not the same.
Get the answer through research, not a fluke.
All you have to do is guess my name.

Archduke Franz Ferdinand

Nope.

fuck if I know

is the game any good?

It's pretty good, yeah. Nothing groundbreaking.

Grape Ape

No.

Nils Olav

I'll add more to the riddle.

Like I said, all you do is guess my name.
Here's a hint: Research the game's name.

magilla gorilla

Have a tabby cat picture

Grape Ape.

Douk nu kem

King Kong.

King Solomon ?

All of you are very far off but you are so far the closest.

Gusion

...

You got it.

Here's the code.

DMC6M-0LW5I-NQWV9

How did you found it ?

Wikipedia Ars Goetia.

that's cheating

Nope. He got it, my dude. He researched.

Goetia is what the Lesser Key of Solomon is referred to sometimes and grand duke gave it away since there are different rankings of demons in the book (king, prince, duke, etc). The other parts of the riddle is traits of that specific duke.

So, do I get something too?

here, I didn't redeem the code so it might still be available. I was just in it for the riddles.

Does anyone have Lightning Returns?