Galaxybuilding Challenge

So, Veeky Forums, let's do some worldbuilding with a twist.
Go to philome.la/johnayliff/seedship/play, start a new game, settle the 10th planet you come across. Based on what the game gives you, give us some lore about the world. Perhaps we can build an Imperial Sector?

I'll start off.

The planet Tilius IV is designated as a Medieval world, with the population ruled by a dynasty of Hierarchs. Tilius itself is of little concern for the Imperium, though the Glory Seekers Space Marine Chapter has expressed interest in using the planet as a recruitment world, due to its extreme temperature, planet-spanning ocean filled with toxic weeds and kelps, brutal regime and low level of technology resulting in a hard-as-nails and cunning population, traits highly valued within the ranks of the Adeptus Astartes. Of greater concern for the Imperium is the moon of Tilius IVa, which is packed with prometheum, in addition to more common metals. A mining station is currently under construction to exploit this wealth.

Well, this is interesting.

>colonists settle beneath the waves
>wear special clothing to protect against heat, but 39 die when cooling systems fail
>poisonous plants kill hundreds more before they are cleared away
>expedition to ruins leads to defense system killing explorers
>last few original colonists engineer new humans who are accustomed to the low gravity
>a war erupts with the natives and the remnants of humanity are kept as slaves

>this system is in an area of dense interstellar dust which hides most of the brightness of the milky way
warp storm confirmed

Did I do it right?

It seems like all Oceanus worlds are good.

Arid sounds pretty badass (in a way that the planet is cool not for those who live there) desu

Neat! So, tell us about these worlds!

Eh, I already had my turn, but here's the basics for the others I ran

Behold faggots, borderline peak-comfy