I would also really like to nuke them occationally, even if it's to my own detriment.
So I'm suggesting the Realms of the horsemen.
Access to these realms would be similar to visiting the great old man in the sky, however, their "gateways" will only be opened while that horseman is in town.
Each horseman would have his own promised lands, but they would trade in refined goods.
White: Glass Red: Enriched Uranium Black: Steel Pail: Aluminum (Coal is universal so pffffft )
Anyways, within these realms, the effects of the horsemen will always be felt, so you want want to stay long. (ie. You're gunna get corrupted/Starve/Lose a hull point/have a long an bloody battle with whoever else made it in during such a rare occurance)
But why would you want to come here? I hear you asking.
To unlock the secret suprises of course. (details of the secret suprises are currently not know, but I feel they could have something to do with monuments... or some other "unique" ability)
Unlocking the secrets shouldn't be as simple as Democracy, no sir'ee. And they should be unique to each horseman. And HARD. And maybe involving visiting the other horsemen to complete them.
ie (The Red horseman is pissed that the other horsemen get to leave their realms more often. Lob 5 EUR at each of them and report back for your prize - sort of hard)
Could be fun no? Details and specifics and such would of course be up to Rasts disgression...