1999 A.D.

[Vanhal]

So, my eternal quest for achievments is legitly come close the finish. Evertyhing remaining is just the matter of time.
However, this one eludes me. I cannot remember EVER seeing this particular leviathan (unlike Infinity Machine and Tiyanki Matriarch which seems to be in every single game, no matter map size). Furthermore, available guides are a bit unclear. So, how to make it show or know it has spawned? Do i need to just survey that planet or colonize it?

 

[Korvash]

It appears the same way as the Ether Drake/Matriarch/Horror/ etc. its a hostile entity.

I had it in my current game.

You don't know it spawned until you find it I suppose

edit: I was just flying around in a system. if an anomaly is required, then the AI did it probably

 

[Talanic]

I'm 90% sure it spawns eventually, even if nobody settles the planet. I wound up getting it in my last game, on the third planet I'd settled. Settling definitely provokes it into spawning right away.

Sometimes, on surveying the planet, you can see Rifts have already formed. That's a dead giveaway. However, sometimes the rifts open, wreak havok, and close - the voidspawn dies in the shell and never hatches, meaning no achievement.

If you want to find it - to be sure it's even there - the only way I know of is to open up your save file. Look for hatchling_egg - that will tell you what system it's in.