Google has tried many experiments over the years. Today we will list 15 of them:

Google Gravity
Epic Google
Weenie Google
Google MentalPlex
Elgoog
Search for Chuck Norris
French Military Victories
Google Hacker
Pacman on Google (After the anniversary)
Change the background of Google
Google Pirate, Google Pig Latin
Tilt
Spam Recipe
Dragon Slain
Google Sphere
Google Gravity:

Search for Google Gravity on Google. If you don't use Google Instant choose the I'm Feeling Lucky option.
If using Google Instant, choose the first result.

(Click on any image for large view)

Now you are on Google Gravity. Everything will fall down as if gravity was down there, although you can still type in (But no Google Instant) and you can drag the parts with your cursor.

Epic Google:
Search for Epic Google on Google. If you don't use Google Instant choose the I'm Feeling Lucky option.
If using Google Instant, choose the first result.

Now you are on Epic Google. The Epic Google logo and the search bar will get bigger and bigger until they go off screen. You can still search until they go off screen.

Weenie Google:

Do the first steps of all of those except fill that with Weenie Google. Weenie Google is the opposite of Epic Google, and shrinks constantly until it disappears.

Google MentalPlex:
Do the first steps except with Google MentalPlex. Mental Plex is an old April Fools Joke from Google. It tries to trick you into thinking that it can see mental images in your mind and search them.

Elgoog:

You know already what to do from the previous cases. Elgoog acts like a mirror, showing Google like it is in a mirror.

Search for Chuck Norris:

Repeat the previous steps (This is the last time I will be repeating this). Google will say that you don't find Chuck Norris, he finds you.

French Military Vehicles:

In this case, Google will do a Did You Mean French Military Defeats, although this was removed. There is a site with a picture as the first result though.

Google Hacker:

Here Google will be represented as hacked and will use the alphanumerical set (Present in most text messages and online chat).

Google Pacman:

Google Pacman was from the anniversary, although it is still operational. If you want to play Single Player, click Insert Coin once. If you want to play Multi Player, click the Insert Coin button twice. The controls for Multi player are the WASD keys and the arrow keys.

Change the Background:

When you sign into your Google Account, in the bottom left corner there is a Change Background picture button. You can choose your picture from your hard drive or Picasa Album. Enjoy!

Google Pirate and Google Pig Latin:

Just search and you will see how it is in different languages.
Tilt:
When you type in Tilt or Askew in the search bar, Google will lean a bit to the right and will blur a bit. The position is not maintained after searching for something else.

Spam Recipe:

When in your G-Mail account and go into your spam folder, the ads show foods with the word spam somewhere in the ad name. They are recipes.

Dragon Slain:

If you use Google Chrome, you can install Google Docs from Google, make a new spreadsheet and click Shift+F12. In the bottom right corner Google will type in Dragon Slain.

Google Sphere:

Google Sphere makes the words go around the Image Search Bar and they go counter clockwise or clockwise, depending on which part of the screen your cursor is at.

Muhammad Junaid

Muhammad Junaid is the writer of Entertainment Ghost. He writes articles, reviews, previews and entertainment news about gaming, technology, the media and so on. You can follow him on Twitter @Mr_MJunaid and Facebook MJunaid

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Google Experiments

Muhammad Junaid