You find yourself in a strange world, probably touched by superior technology, where big portion of Earth science is invalid. You have to learn new rules, rules of this world.
There's deadly radiation that no known shielding works against. There's alien life, but more surprisingly also some edible plants just like on Earth.
Radio doesn't work, air doesn't allow flying, some basic Physics does not apply here.
You struggle to live on this planet, and read Stalker by Strugatski brothers once more.
* Improvements to how the story of escaping from Deneb 7 is told to player. Currently one has to read technology help texts very carefully to understand why the tech tree looks like it does
* Inclusion to main freeciv project. For now having Alien World as separate project makes rapid development easier, but once it stabilizes and becomes really playable, it should probably become part of freeciv project itself.