Make your own maps and share them online! Create your own FPS levels and maps with the built in Rekoil construction kit – use the powerful modding tools to bring your custom arena designs to life and share them online with other Rekoil players. Frag your enemies back to the stone age!
Most popular community and official game content for the past week.  (?)
What does popular mean?
It means the content you're seeing has been rated up more than it has been rated down for the given time period.