Argthtjtr

I'm searching for a word that describes being passionate about participating in and building new things in other worlds or communities. Note that this is unrelated to the exploration of those realms.

Some examples would be:

• A fascination with building a colony on Mars. (But not necessarily exploring the planet.)


• Passion for building things in Minecraft, or role playing in other virtual worlds.


• Longing to travel, not to see new places, but to experience or influence different communities, places, or cultures.

The word could be descriptive, "He loved to _______, that's why he went to Mars." a title, "He was a ________, that's why he went to Mars." or any other term that fits, usage is not a restriction.

As far as a noun (which your second blank requires), you can try

world-builder

Once you step Inside the Funhouse..you will see that the world-builders are just as weird as the worlds they build.

Above example from the Oxford English Dictionary (OED)

Also: world-maker from the same source.

Also settler, as one who settles in a colony is helping to build it.

You may have to settle for different words all of those points.

In addition to Knotell's answer of world-builder for your first and second points, there's wanderlust for your third.

wanderlust: the wish to travel far away and to many different places

• 
  

  In July wanderlust takes over the whole nation.

  
  




• 
  

  Many of our troops now abroad will be possessed of the wanderlust when they return.

  
  




• 
  

  Vikings' seaworthiness and wanderlust resulted in new areas being developed.

  
  

There's also globetrotter, but I don't think it fits as well as wanderlust.

globetrotter: someone who often travels to a lot of different countries:

A pioneer is one of the first to settle in a territory, and we frequently hear about someone's pioneering spirit.

Throughout history, women have evidenced a strong pioneering spirit. They have charted new paths, explored virgin territory, endured hardship, and braved danger.

Perhaps the first image of a pioneer that comes to mind is of wagon
trains headed into the Western frontier. Those early settlers
demonstrated tremendous courage, risk, and inner fortitude–traits that
are still needed today. Harrowing stories of pioneer women abound. As
they forged into new territory, the trials they suffered are nearly
unimaginable in our convenience-based society. [source]