So i have played for some time on new 2.0 existing map like 30h and wanted to add this mod (used often before 2.0). The problem is with alien remains not spawning. I used the command to reveal map like 1500 and still don't see any, is there a way to add this to existing map the basic one ?

Hey, if you've used commands anyways, I think the easiest way is to use a command to spawn in few alien remains. :)

You can find the command here: https://wiki.factorio.com/Console#Add_new_oil_patch
Just replace "crude-oil" with "remains"

After a while i used editor command and spawned few ones, thank you for reply. I think this will be helpful for those with existing map.

is there a way to add the remains without console commands? It's just that my friend and I have been playing for 20 hours and downloaded the mod before we created the world, but for some reason the remains still did not appear.(we want to have achievements)

Remains should start turning up on Nauvis when moving further out.

I have confirmed that remains do spawn but I'm not 100% sure how it works on already existing saves.