Solution for surprises 1-9 been posted.

• Surprise 9:
  Thank you for attending the party!
  GlaDOS arrived to sing a song and hand out one last cake.
  (Note: It does not contain Portal or Portal 2, but a distant relative instead)

My birthday passed (April 12th) but the giveaways are still active!

• Someone should bring cake .

• This is art.
  when you hear a buzzer, stare at the art.

• At the party, smooth jazz will be deployed

• To entertain the guests, we will start with a mag ic show!

• If the magic show bores you, you may want to check out the scoreboard on our Riddlers Labyrinth group. You'll find gold!

• For those of you that found surprise 6, you may want to check it again. Just be careful of the zombie. Don't look into its e.y.e.s.

[Fruit mini puzzle: Surprise 6]

• If you're hungry, we have 613 of my favorite fruit! Just don't get too greedy

http://bit.ly/TzellsFruitIs*

Replace * with the fruit. For example: http://bit.ly/TzellsFruitIsApple (Remember capital letter!)
It also appears in this video, the fruit is related to Rosh Hashana, and its red.

Solving this will grant you 1 puzzle point, remember to ask for it by filling your name when you get there.

• Note regarding PuzzlePoints:
  1 puzzle point was given to those who asked for it on Surprise 6 giveaway page.
  The method had changed.
  In case you were not granted 1 puzzle point (if you did not ask for it specificly), please request it through the new link on surprise 6 page.

Also, in case you want to change your highscore name, you can request it here

Solution

• Surprise 1: There were 2 "art" links. The upper one was a decoy, the second one was a link to Luxor 5th passage.

• Surprise 2: The cake link had a hidden link inside it, you had to press the "dot in "cake ." to reach Portal. Space was intentional to draw attention.

• Surprise 3: Portal giveaway had a big link saying "The cake is not a lie". It lead to STORM.

• Surprise 4: The "Mag ic" link had a similar hidden element to the cake link. Pressing the "ic" led you to Magicka Complete Collection

• Surprise 5: The link was inside the Riddlers Labyrinth Scoreboard. It can be found as a link in the Riddlers Labyrinth group. It lead to Lead and Gold

• Surprise 6: The fruit was Pomegranate. The correct link was http://bit.ly/TzellsFruitIsPomegranate. Lead to Greed Corp.

• Surprise 7: Greed Corp giveaway had a big link with the word "Zombies" in it that lead to Plants Vs Zombies Giveaway.

• Surprise 8: Plants Vs Zombies giveaway had a link in the third dot "Remember not to look into their e.y.e.s". Lead to E.Y.E: Divine Cybermancy

• Surprise 9: Following the video revealed the sentence FoxInaQube. Giveaway was Q.U.B.E