|OMGN: Game Platform|
The platform is what the game runs on. The platform can range from a home computer to a console: it is the actual machine that the game is played on.
Since some games are downloadable to computers, we must take into account that different computers have different operating systems, such as Macintosh and Windows. The list given for the game platform is comprehensive enough to account for the major operating systems.
There are many games that are played in a browser. If you are submitting one of those games, then it is likely able to run on any computer platform (And maybe consoles, if they have a browser). Generally said, just put the game into the Computer category.
If your game fits into more than one category, then choose Multiple. If it doesn't fit into any listed, choose Other.