It's a little bit hard because it requires us to unpack every sga with the map makers permission and edit the map name
This is your best bet:
Although admittedly, the EiR:R maps all have a lack of symbol to their right, while Relic maps have the Relic r and community maps from retail have 3 silhouettes.
It should be possible to remove vCOH maps we don't want from showing up
Unknown, what if there was a game on achelous river? after 60 minutes at 50/50 what happens?