Here comes the list that you have been waiting for: The list of Global Game Jam 2013 Diversifiers.

The GGJ Diversifier system is a system aimed at diversifying the games as well as providing motivation for experienced game jammers. In a sense, the diversifiers are a free-for-all voluntary list of secondary constraints, that the individual teams can choose to go for, or not, as they please. If they do go for one or more diversifiers, they get to tick off those diversifiers as fulfilled when uploading their game. As stated above, the diversifiers are absolutely voluntary, and no points are given for taking them. If you are a first time team of students, we recommend that you focus primarily on the overall constraint, and only add in extra diversifiers if you feel sure you will have something to hand in on Sunday.

Global Game Jam 2013 Diversifiers

1. Stay Inside The Box
The whole game takes place in just one screen, no scrolling or changing screens in any way is allowed.

2. True Colors
The game uses only the basic 16 colors: black, gray, silver, white, maroon, red, olive, yellow, green, lime, teal, aqua, navy, blue, purple and fuchsia. http://www.december.com/html/spec/color16codes.html

3. Atari Age      
The game must be, at a maximum, 4Kb in size.

4. I Know What You Did Last Summer          
Game world is persistent between sessions and changes from one session affect game play on the following ones.

5. Backwards    
One or more aspects of the game works the opposite as would normally be expected: maybe the controller is reversed (left is right, right is left), maybe you win lives every time you die, maybe it scrolls to the left and your character moonwalks.

6. I’m Board
Make a game that is inspired by, but not a simulation of, a popular board game.

7. The Truth is Out There       
Some external real world element, such as weather, time of the day, etc, affects gameplay. It MUST affect gameplay and can’t be only a scenario element.

8. No cheating (please)
The game system relies on willing player participation to enforce the rules of the game world (e.g., hold your breath, close your eyes, etc.).

9. More the Merrier    
The game is a competitive or cooperative multiplayer "party game" (i.e., based on minigames, humor, 4+ players, audience engagement, etc.), meant for one screen or more.

10. 10 little pigs  
The game uses 10 or more buttons or keys for gameplay-related actions (no pause or anything else).

11. Two Are Better Than One   
The game requires two or more different mobile devices to play.

12. Approved for All Audiences
The game must not show any violence, not even cartoonish. Stepping on living mushrooms is off the list, as is killing any type of enemies, not even undead, though we know they’re already dead…

13. Inclusive
The game is specifically designed to include people with a given disability. 

14. X Marks the Spot
The game involves something location-based, such as a geocache, or requires the player to go to one or more specific geographic locations.

Sponsored Diversifiers

15. Bigger Picture          
The game touches on a political, environmental or social issue.

16. May the (Web) Force Be with You
The game runs in a browser with no plugin.