Here are the Game Over Guides.
"Did you break Goro's Chandelier?" *confirmed*
-Notes: Perhaps a breakable object in the arena where you fight Goro? Unknown
exactly.
"Tell your friends" *confirmed*
-Notes: Harmless marketing? :\
"Have you seen the white bunny?"
-Notes: Most likely a connection to one of Kung Lao's bitchin' fatalities
(performed by Up, Up, Up, Up, Square/X)
"Look up to find help"
-Notes: Rather vague and unknown. Perhaps a connection to looking to Rayden for
guidance? Or looking up information on the Internet? Unknown thus far.
"Did you feed ALL the trees in the forest?" *confirmed*
-Notes: In regards to the ability to pop your enemies into the various hungry
trees strewn about the Living Forest, as remembered from a rumor from MKII
Arcade. Whether this has a deeper secret or meaning is unknown.
"Can you see the invisible penguin?" *confirmed*
-Notes: WTF? NO ONE knows what this means, or if it's in fact in the game.
"Sheeva, Sheeva, SHEEEVA!" *confirmed*
-Notes: Someone having a little too much fun with Sheeva, perhaps? Of course
this particular quote is pointing to the four-armed Shokan female fighter of
MKIII, which was a love-hate character with the fans. Nothing is known about
whether or not this has anything to do with an element on MK:SM.
"There are more Secrets in The Pit."
-Notes: A hint that means that there might be more to the initial Pit level,
seen earlier in the game, than just a floating red orb (a secret). Perhaps it
means the shadows gliding gracefully over the moon, as seen in the original MKI
arcade machine so many years ago? Or maybe there's another game play benefiting
secret hidden somewhere amongst the spikes? Only time will tell.
"Boss Rush Mode?" *confirmed*
-Notes: Perhaps it means that you can unlock a mode from the Main Menu that
lets you replay all of the bosses? I would love this, since the Scorpion fight
was the most fun I've had with an MK game in a long time. Maybe it was a mode
that was later cut from the game, and they forgot to remove this particular
Game Over message? Unknown.
"Where is Kano?"
-Notes: Maybe it's talkng about Kano's absence through the majority of the game
(until the end, that is).
"Why is Liu Kang hungry?" *confirmed*
-Notes: Another WTFer that no one can quite put their finger on.
"Buy the Bicycle Kick"
-Notes: The game hinting to you to purchase the Bicycle Kick for Liu Kang via
experience gained, which I assume is an integral move for him (I've only played
through it with Kung Lao).
"Where is Kenshi?"
-Notes: A long person contributed this quote, and I think it's a little fishy,
since Kenshi isn't a character that shows up until the MK:DA and MK:D games.. a
lot later in the mythology of MK. I'm not one for the game's story, so I'm not
sure if Kenshi's biography has roots all the way back to MKI/MKII. Someone
wanna confirm this for me?
"Ask Ermac For Help"
-Notes: Probably rooting back to the fact that Ermac is a hidden boss in the
game, and a good one at that.. I haven't even found him yet. Most of you will
also remember the whole Ermac/ERrorMACro fiasco that plagued MKI as a rumour
back in the days of yore, as well, which this probably has a faint connection
to.
"Free Princess Milewski"
-Notes: I forgot the exact spelling of her name, sorry

This is in relation
to a voice actor for the game by the name of Beth Milewski, who I assume did
the voices of the females in this game (and Kitana, who you must free from a
mind control early in the game, and then a prison cell later in the game).
"BLACK, [L Trigger], [R Trigger], WHITE" (Xbox) *confirmed*
-Notes: A curious combination for the XBox version that no one has the
slightest clue on where to input it. Unknown.
"R2, L2, R1, L1" (PS2) *confirmed*
-Notes: Same as the one above, only for the PS2 version. /me shrugs
"Baraka is playable in VS. mode" *confirmed*
-Notes: Pretty cut and dry here, probably here to bring to the gamer's
attention that you can play with a handful of fighters in the VS Mode portion
of the game, which REQUIRES two people >:(
"Kabal thanks you for playing"
-Notes: What a nice guy, especially during his brief cameo in the Wastelands

"Shinnok Found?!"
-Notes:In The Netherealm there is said that Shinnok is floating on lava and Quan Chi is bowing to him. I'll check this out.
"Find Quan Chi and you'll know everything" *confirmed*
-Notes:In the ending...
"Did you look carefully?"
-Notes:Totally unsure. I guess the coins.
"Johnny Cage is not a fake"
-Notes:Well refer to the movie.