Packages with the maps use flag

app-misc / zygrib : GRIB File Viewer - Weather data visualization

  • Installs additional GSHHS maps for high resolution coastline data and cities

games-fps / nexuiz : Deathmatch FPS based on DarkPlaces, an advanced Quake 1 engine

  • Install the community map pack

games-fps / worldofpadman : A cartoon style multiplayer first-person shooter

  • Install extra maps (PadPack)