Unfortunately this would never be possible for such a small game and a small dev team, but if realm ever became a bigger maybe standalone game, rather than a flash/browser game. I would love to see a single player offline campaign mode, like a story mode, where you start a light-blue star and work your way, gaining loot, feeding your pet buying vaults for fame and char slots and everything. It could be a standalone game in itself.
Something like this does exist in [Private Servers…which are not supposed to be discussed here. OB], but that is still largely reliant on teamwork, therefore all the classes would need a re-work for playing solo rather than with a group, maybe even have npc’s that follow you and help you out as you quest your way through the game. The game is already like this in some ways, you can choose to play whichever you want right now, join groups and tackle shatters and event bosses, or just play solo grinding abysses until your brains fall out.
But what I propose would be offline and standalone, have specific star-related quests with a whole storyline rather than being so open and random number generator based.
Again though this would never be possible because it would require remaking the game completely and updating it at the same rate of the online game. Realm’s player-base and Deca’s dev team is way too small to deal with such a huge task.
EDIT: Honestly if anyone has the time and money to invest into such an idea I am sure you could change the game enough to not infringe copyright, could be quite a valuable game if made well… Just suggesting.
[Private server discussion tweaked. OB]