For the cross map medals, maybe the graphics could be changed, so that you still have the globe, but inside is a number denoting how many maps.
It could be levelled in the following way:
Bronze world with '25' inside: Defeat 5 opponents on 25 maps
Silver world with '25' inside: Defeat 50 opponents on 25 maps
Gold world with '25' inside: Defeat 100 opponents on 25 maps
Then, as follows,
Bronze world with '50' inside: Defeat 5 opponents on 50 maps
Silver world with '50' inside: Defeat 50 opponents on 50 maps
Gold world with '50' inside: Defeat 100 opponents on 50 maps
Bronze world with '75' inside: Defeat 5 opponents on 75 maps
Silver world with '75' inside: Defeat 50 opponents on 75 maps
Gold world with '75' inside: Defeat 100 opponents on 75 maps
Bronze world with '100' inside: Defeat 5 opponents on 100 maps
Silver world with '100' inside: Defeat 50 opponents on 100 maps
Gold world with '100' inside: Defeat 100 opponents on 100 maps
Obviously, the language should be written to match existing medals "Player has defeated X unique player on x unique maps" or however it is written.
There are several benefits to cross map medals made this way.
1) It allows for expansion:
Previously, someone suggested we make a 100 maps medal. By the time it was replied to, we had 102 maps. This way, as new maps are added, the medals can expand to include them.
2) It follows with the current way medals are awarded.
The language and standards of this follow closely the other medals, where it is number of opponents that determines the color of the medal.
I have some CC experience, but not nearly as much as others here. I think that the current number of map increments (25) is a fair method. It currently allows for 4 levels of achievement. I don't know how often maps are generally added, but this seems like a good number. However, it could be changed to every fifty, if 25 creates too many medals. I would say less, such as 10 maps per medal, but this might create a flood of medals.
The other side of pacing is the number of opponents defeated. I used the current standards as guidelines, where bronze is relatively easy (20 opponents is like winning 4 games of 5 players, therefore even a low win rate of 10% can do it in 40 games) silver, which requires some dedication and committment, and then gold, which is for the really hardcore, skilled, or crazy. These could be adjusted based on input from someone who has more experience than me, to levels like 1, 10, 50 people defeated.
This doesn't bother me so much, but from reading other site admin comments, people might take offense to this. Once someone has received a bronze 100, a bronze 25, 50, or 75 is redundant. A gold 25 is still useful, as it says higher numbers killed but on fewer maps. I don't know if it can be coded to no longer display a medal when it is redundant. If this needs further clarification I can do a chart.
This is my rough idea for improving the map medal, since there are a lot of suggestions about it. Does anyone have any feedback?