I just added my new favorite variant to the variants page called Southern Annex.
This variant takes place on the Double Earth map where the southern Earth has had its bonus values increased by 5x. This means bonus values range from 15 to 35, but only in the southern world.
This template uses a custom scenario to start all players on the northern Earth. Players must take down a neutral of size 30 to enter the southern Earth.
This game uses two special rules that players must obey:
Rule 1: Under no circumstances may players deploy any armies in the southern world. No exceptions. All deployments must happen in the northern world.
Rule 2: If you are eliminated from the northern world, you clearly can't take your turn, and therefore must surrender.
Here's the template to use.
Since players can never deploy in the southern world, fighting there is on a big delay. Players must make a big stack in the northern world and let it coast down to their southern front lines.
Ideally, this should be played with 6 players since there are 6 entrances to the southern world.