The games dropdown menus exist to help standardize the options available
 (example: 4E vs. 4th Edition vs. D&D4). No matter how many 
games are listed, some may not make the cut. Games are added to the list
 periodically. This ensures obscure listings gain greater visibility 
when sorted via the  Other Games  option and helps keep away “empty” search listings for underrepresented titles.  If
 you feel a game should be listed, encourage your community members to 
play and post often. The more community attention a title receives the 
more likely it is to be added to the list.     You don't  need  a system to be in the dropdown 
list to play it; use 'Other Games' and put the name of the system in the
 listing text, all the forms of it someone might use.  Actually play the
 game.  Ask those you know who play the game to do likewise.  You don't  need  a system to be in the dropdown list to have a character sheet for it; ask in the  Sheet Request Thread, Consolidated, mk I 
 thread for someone to help you make or make a character sheet that can 
then be added to the list of character sheets available to users for 
their games.  You don't  need 
 a system to be in the dropdown list to ask the writers of a system to 
think about licensing their system for use with the Roll20 VTT; talk to 
whoever produces the system you're interested in, tell them how 
interested you would be in being able to have an Official Character 
Sheet and Official Compendium available on Roll20.  Ask those you know 
who play the game to do likewise.     The Devs have stated the Suggestions 
forum will never be a viable way of getting games into the dropdown 
menu, so don't be surprised if/when this thread is closed to release your votes.