Well, did you do what the message suggested and did you see the biggie in the yard yet?

No... In fact, i didn't understand jack of it all... I merely read in some online discussion that you only need to read that message on the pc and kill the werewolf in griffith park with the sliding doors. But it didnt' work.

Strangely enough I ended up triggering this by accident the first time through, because I have a terrible sense of direction and I had forgotten which rooms I had already been in, so ended up entering all rooms multiple times when all of a sudden the "biggie" popped up.

At first I thought it was some freaky enemy or something (since I was following the serial killer at the time) until I saw what it actually was...

I also thought that being able to trigger the easter egg ending was only dependent on triggering the "big in the yard" event via the doors - don't think killing the werewolf in GP is necessary is it? I could be wrong...

This rounds up the sum, pretty much!

Well, i read elsewhere that the prerequisistes to get this ending, were only:
a. Unlock motel room with pc, hack it and read the message
b. Kill the werewolf in Park with the sliding doors
c. Choose the dialogue line in Ending Sequence

(seems like they were mistaken)

Now as Wesp says, i absolutely needed to open doors excessively, until the big wolf appears! Then the line will appear in Ending sequence!

Thank you both for solving this. It is the one and only ending i haven't got. Will start a fresh run immediately.

Please wait a few days as the UP 9.8 is just around the corner :)!

Man, already? Wow, you work fast! Don't worry, i got this; until tomorrow it will be done. Once i sit for a Bloodlines run, the game runs out quickly!

No, there luckily is less and less stuff to fix or add :)! Wow, you play fast ;)!