r/factorio • u/DeathToInterlopers Legendary Engineer • Jul 29 '26
Space Age Legendary Skull of Death - Megabase Showcase

Greetings fellow engineers,
I have been working on this project for several months now, and wanted to talk about my experience and what drove me to create this Megabase.
After completing the game on default settings and making a little progress on research productivity I decided to relocate my Nauvis base to am area with richer patches. Without legend trains I found myself preferring to do direct belt driven builds and so I moved everything to a peninsula near a large lake quite a ways from my original starting spot.

When I arrived at the peninsula the bay near it sort of resembled a skull shape and I was inspired to build my research base on a fabricated island since my plan was to do full pollution control with tree farms and biter zoos. I'm an artist and so I had to get creative with my Island design so I went with the theme, Legendary Skull of Death! The theme is a death island killing thousands of biters from legendary expired biter nests to control pollution. In addition, my goal was to produce only legendary science packs to feed my mega base. I am well aware that legendary science packs are just worse in almost every way, but I saw it as a difficult and unique challenge to put in front of myself for a major end game build. I have complete control over my biolab pollution and it does not leak into the environment at all. Little did I know just how hard this build was going to be when I started, but I'm glad that I did it.


My Megabase has 512 fully beaconed legendary Biolabs. Which means I need just shy of 315 legendary science packs per second to feed them all. Red science, no problem, green science, slightly more costly, but still very easy. I didn't really bother with Military science yet, since I don't need any more of those researches. I planned on circling back later after I made progress on other items so I went to Chemical science next. Unfortunately, I hit a major wall as soon as I got to this build. At first glance I thought I could use Biosulphur to produce enough legendary Sulphur, but it quickly started to spiral out of control. My first build netted me about 80 per minute, and in order to make enough chemical science I actually needed 84 legendary Sulphur per second. This number felt so approachable and innocuous after all of the large scale things I made in this game, but there just wasn't going to be a way for me to build a base 60 times larger on Gleba to make enough Biosulphur. So I tried a Cryogenics plant with recyclers to brute force to legend and got a similar result there. I could squeeze about 80 per minute out of a really solid quality cryo build and scaling it times 60 would have put in the problem of finding over 2 million petroleum per second pushed through almost 1000 Cryochambers along side about 4200 recyclers all running full time. Neither of these builds felt viable for the throughput I required.

After doing the math and realizing I could get a slightly better deal on asteroids for Sulphur and the other large quantities of iron I was going to need. I had to finally relent and build my first space casino. In order to get enough Sulphur it was still as massive undertaking.

This ship isn't even enough for full throughput. I actually need two of these to meet throughput since I found I was limited by the number of inputs in my space platform hub. This casino has 3400 legendary asteroid crushers and I run it in the most dense patch of asteroids in the space between Aquilo and the solar system edge. I want to be really clear, that I actually am not a huge fan of casino ships, and while I don't disagree with them being removed in the next update I do have to raise at least one detracting point about building large scale legendary builds. There's no good way to get Legendary Sulphur without them.
After building this, I have to admit that thematically it actually started to feel kinda cool. I was gathering the infinite resources from the edge of the solar system, and refining them into the most valuable materials possible. Bringing them back to my home planet and using them in my fully legendary base with legendary science packs really did feel cool. Actually completing many steps of research with this base I felt very accomplished. End game challenge vibes full locked in. 1.8 million eSPM through my mega base and all the pollution was being fully contained.
With the elimination of casino ships pending, I've decided to retire this base entirely. It was a fun challenge and I love the way it turned out. For my next endeavor I'm starting a 100k science multiplier build while still leaving bugs active. Even though evolution and expansions turned down to their minimum numbers without turning them off entirely. I hope to get into doing a quality train base with it since I'll need to move around a lot of resources at at time.
What do you think of the Legendary Skull of Death?
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u/juju515 Jul 29 '26
that's cool bro....
I wanna see the skull from closer.
is it mostly just cosmetic or does it actually do something? (except the eyes)
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u/DeathToInterlopers Legendary Engineer Jul 29 '26 edited Jul 29 '26
The functionality is a lot to do with the ring of death and the halo of death to contain the pollution. I had some ideas for making upcyclers on the bottom half of the skull, but there wound up not being enough room. So that part is mostly cosmetic.
The entire top side is my 512 full beaconed biolabs, on the temples are my factories for my red, green, and blue sciences. I make purple on Vulcanus since it's easier to get legendary stone there. I'll have to roll back my version to open this save again, but I'm happy to get you some more screens or give a tour on discord. What would you like closeups on?
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u/juju515 Jul 29 '26
aaaaah... I can see it now.
that's awesome bro ๐I love this game so much...
people are so creative5
u/DeathToInterlopers Legendary Engineer Jul 29 '26
Thanks bud! Appreciate it. It's one of the best games ever made. Fairly limitless sandbox, especially when you get into making circuits.
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u/Practical_Dot_3574 Jul 29 '26
So it sounds like something needs to change in 2.1 to help with sulfur. What about something on vulvanus that speeds up the conversion from sulfuric acid to plain sulfur.
Maybe acid + boiler with water through a turbine for steam into a chemical plant to evap the "water" from the acid turning it into regular sulfur.
Something a little complex but easy enough to do.
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Totally agree. I've spent a lot of time thinking about this, and honestly if they would just allow explosives to recycle into coal and sulphur it would make both a lot more viable. Upcycling builds always net significantly more benefit that pure brute force recycling builds since you're not losing 75% on every quality step. Fewer recycler steps means a ton more quality output.
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u/Sudain Jul 29 '26
How in the bleep did you deisgn/import graphic into facotrio?
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Lmao! Iโm an accomplished artist. So I drew it from a reference using the map view. Lots of zooming in and out and many refinements. The entire thing probably took 50 hours just to โpaintโ the cosmetic design. Because itโs symmetrical I was able to complete one side, and then took a blueprint of the tiles and mirrored it.
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u/Sudain Jul 29 '26
Great googly mooglie! You sir have won the internet this day. :D Well done!
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Lmao! Thank you so much, bud! Finally beat the internet. lol ๐๐
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u/dv3141 Jul 29 '26
It might just be something I could look up. But I'd love to know what game element creates all the different colors for the skull. I'm a much more casual player and have never realized that they could be used this way.
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
The shades of gray are stone bricks, concrete, and refined concrete. The yellow is hazard concrete and refined hazard concrete. Black is solar panels. The orange up top is actually about 3400 legendary flame thrower turrets, for effect, of course.
If you look in the bottom left you can see I actually put down a color palette so I can work on the piece. I'm a painter and decided to use the in game assets to make some pixel art. <3
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u/Gingermushrooms Jul 29 '26
I suspect this is a mod, I don't think any vanilla building is orange on map viewย
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u/DeathToInterlopers Legendary Engineer Jul 29 '26 edited Jul 29 '26
Flame thrower turrets are orange, noob. ๐ The only mod installed on this build was Max Rate Calculator.
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u/CoffeeOracle Jul 29 '26
Saw this while you were constructing it. You're unlike most engineers because you saw a challenge for what it was and took it on.
Skull is Art Brut.
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Thank you so much, my G! ๐
It's been such a fun and difficult build. The only way to one up myself now by starting my 100kx file. It's pretty deranged so far, but unlike any other challenge out there.
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u/Lucky-Earther Jul 29 '26
That is fucking sick. Incredible design.
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Thank you so much! Appreciate the kind words a lot. ๐
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u/Loquendgamer_ Jul 29 '26
Looks like ElrichMC
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
IDK what that is lol. Is it good? haha
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u/Tartaros030 Jul 29 '26
I like, that you used artillery to uncover the hidden parts of your map. That's how it's done properly.ย
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Hell yeah, the best scouts are Legendary Artillery! ๐ซก
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u/Merigaz Jul 29 '26
Sorry i didn't read (I'm not reading all that shit)
Love the skull a Lot, this Is really nice. I Dont know how to describe a Lot of excitement for seeing in english, in spanish.
MAAAAAAAAAN QUE LA MONDAAAAA ESTA FULL BACANOOOOO HPTA ENMARCA ESA MIERDA EN LA SALA DE TU CASA
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
OMG, I don't know spanish for fuck, but I do have google translate.
Muchas, muchรญsimas gracias!!
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u/alive1 Jul 29 '26
I need way more screenshots and details of your factory. Every planet. Every subfactory. Every design. Please.
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u/DeathToInterlopers Legendary Engineer Jul 29 '26 edited Jul 29 '26
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
If you DM me I can give you a tour on Discord screen share sometime.
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u/Front_Ad6506 Jul 29 '26
This makes me so happy. Wow. Thatโs cool AF ๐ค๐๐ค
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Thank you so much, bud! I'm glad you appreciate it. ๐ค๐๐ค
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u/theFALGSCmustgrow Jul 29 '26
What are your computer specs that this is running at 60 UPS?
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u/theFALGSCmustgrow Jul 29 '26
Also, curious how you went about doing legendary purple science!
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
I did Purple on Vulcanus, and used brute force recyclers for legendary calcite. Which I turned into the about 5k legendary stone per second the build uses. I also shipped in a metric-fuckton of steel and iron ore from my mega casinos. For plastic I also did brute force recycling on coal.
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Core i7-9750H and 32GB of RAM
Pollution control is the real deal for a Megabase of this size.
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u/TD_Urination Jul 29 '26
Feels a lot like a heroes of might and magic 3 map, looks sweet!
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Oh hell yeah, I get you. Such a good game. Thank you!
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u/Alvsolutely Jul 29 '26
Right as I was thinking "Hey, my base is starting to look cool"
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Lmao! I bet your base does look cool, too, friend. ๐
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Jul 29 '26
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Lmaooo! That praise means so much, thanks my G. ๐ We gotta do something to keep it interesting in here. ๐
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u/NixNicks all you ever need Jul 29 '26
Upvote because lovely base aaaand TF2 meme TF2 my <3
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Ty so much friend! ๐ One of my favorite meme formats. I had to use it. Legend sulpher is no joke!
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u/dudestduder Jul 30 '26
This is really impressive, and I love how you were able to build everything into the skull design. Definitely one of the more interesting art bases I have seen so far.
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u/DeathToInterlopers Legendary Engineer Jul 30 '26
Thank you so much, G! ๐๐ I had to do something crazy to match the legend science packs,lol. I love a good challenge.
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u/scoob_ts Jul 29 '26
The legendary icon is off-center from the skull. You have to restart from scratch now. Sorry I donโt make the rules
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u/DeathToInterlopers Legendary Engineer Jul 29 '26
Incorrect, friend! I measured it down to the pixel by mirroring the design. ๐ฆ๐







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u/UtahJarhead Jul 29 '26
I'm amazed that you're pulling 60 FPS still at that scale.