Please note that Minecraft 2.0 is just the Minecraft April Fools Joke 2013.

Do you want to try the removed Minecraft April Fools Joke 2013? If so, you came to the right place. Here is how to do it:

1. Download Minecraft 2.0:

There is three different versions of it:

Blue	Includes all the announced features without Super Hostile mode	Download here
Red	Includes Super Hostile mode only	Download here
Purple	Includes all of the above	Download here

2.  Make a new profile

 2.1 Open the Minecraft Launcher

 2.2 Select "New Profile"

 2.3 Rename the profile to whatever you want

 2.4 Under "Use version" select "release 1.5.1"

 2.5 Select "Save Profile"

3. Click "Play"

4. Close Minecraft

5. Go to the Minecraft versions folder (Default: C:/Users/yourusername/AppData/.minecraft/versions)

6. Rename the folder "1.5.1" to "2.0"

7. Open the folder

8. Delete the jar file "1.5.1"

9. Extract the 2.0 jar file

 9.1. Open the zip file

 9.2. Drag the file "minecraft" or "minecraft.jar" to the 2.0 version folder

10. Rename both files in the folder to "2.0" but if you have "Show file extensions" enabled keep the last dot and the file extension (The text after the last dot) untouched

11. Modify the JSON file so that the second line has the following text:

"id": "2.0"

Instead of
 
But do not touch anything else

12. Return to the Minecraft Launcher

13. Choose the profile we made earlier

14. Click "Edit Profile"

15. Under "Use version" select "release 2.0" (Please note that this wasn't here before)

16. Click "Save Profile
17. Click "Play" and enjoy

If you have problems, write them in the comments, but you should know that you can't be sure that you get the answer you wanted