¢ There are a surprising dearth of alien invasion 
stories which have any sort of grounding in real- 
world science. 

¢ The goal here is not to worldbuild anomalous 
science fiction aliens and technology or claim alien 
origin of existing SCPs. Do NOT use SCPs as the 
hypothetical aliens or alien tech. No, not even 
especially not 682. 

¢ Who knows what sort of aliens might exist, and 
how they might better understand the universe and 


its natural laws than humanity? But don't sell 
humans too short. The Foundation is one of the 
world's foremost scientific entities and has access 
to entities which defy conventional understanding 
of scientific laws. And yet the Foundation still 
operates under the basic assumption that the 
scientific laws known by the non-affiliated scientific 
community are correct (or at minimum less wrong 
than any other known alternative) except in a tiny 
handful of cases. The point is, SCPs are 
anomalies which may be impossible to replicate, 
no matter what galaxy you're from. 

There's plenty of reason to be downright terrified of 
scientifically plausible extraterrestrial threats; from 
a pragmatic standpoint, it makes more sense to 
develop plans for fighting the devil that you know 
first. 

Perhaps most significantly, assuming hard science 
for aliens and their technology keeps all 
collaborators on the same page. 


Unless their goal is simply to destroy 
civilization and/or life (human or otherwise) 
on Earth, any attempt by HEs to attack the 
planet will necessarily be limited in the 
level of damage that it will cause to the 
biosphere. 


Earth is, to date, the only planet known to mankind that 
is capable of sustaining life in any recognizable form. 
That carrying capacity is delicate, and takes years (or 
decades, or centuries, or millennia) to recover from 
major shocks to the system. If aliens care about living 
here and reaping the benefits of their successful 
conquest, they can't render the planet uninhabitable. If 
they're interested in Earth, their physiology may well be 
dependent upon an ecosystem not dissimilar to our own 
(else they'd go invade some planet where the natives 
would cause fewer problems). 


Attempts by HEs to conquer, enslave, or 
exterminate humanity can be either overt 
(exempli gratia armed invasion) or covert 
(exempli gratia infiltration). 


So, we could be looking at either War of the Worlds or 
Invasion of the Body Snatchers. Different threats, 
different Foundation responses. 


Knowledge of any overt attempt by HEs to 
conquer, enslave, or exterminate humanity 
will be impossible to contain from the 
world at large. 


Even the Foundation does not have the resources to 
hide a fleet of ships appearing in orbit. It is possible, 
given a clear night and a lack of light pollution, to see 
orbiting satellites with the naked eye. If you can see 
something the size of a bus as bright moving light with 
no magnification, anyone with simple binoculars or 
telescopes would be able to see some reasonable detail 
on spacecraft the size of buildings. And any serious 
attempt to conquer, enslave, or exterminate humanity 
would require transporting sufficient military forces to 
defeat the combined military-industrial power of the 
planet. 


"Simple" solutions to attempts by HEs to 
conquer, enslave, or exterminate humanity 
will prove insufficient. 


Could we simply point SCP-682 or SCP-076-2 at the 
invaders, or asking SCP-343 to "make the aliens go 
away"? Yes, we could. This would probably also be 
either ineffectual or boring, so exercise some creativity 
and try something else. Also, it seems unlikely the 
Foundation would risk exposing dangerous and sapient 
SCPs to the aliens lest we find ourselves fighting two 
enemies rather than one. In the course of writing this, 
you're sure to come across "spoilers" that would instantly 
solve everything. Why it doesn't work, I'll leave up to you 


to explain. 


Who can participate in Project Heimdall? 

Anyone! If something strikes your fancy, write it up. This 
is supposed to be cross-disciplinary, so documents could 
range from theories on world political and military 
reaction (political science, military science, economics, 
etc.) to potential technological countermeasures 
(physics, engineering, etc.) to what our attackers are like 
(biology, psychology, etc.) There's a list of suggestions 
below that people are free to add to or use. 


Is this official canon? 
Everything involved in Project Heimdall is officially canon 
within Project Heimdall. Beyond that, it's up to you. 


Who is running this project, out of universe? 

Well, Hornby came up with the idea and got the ball 
rolling, but he isn't Senior Staff. While he's up for helping 
to herd cats coordinate things related to Project 
Heimdall, he's not "running" things in any sort of formal, 
moderating, or administrative way. In many ways, there 
isn't really one particular person "running" this - it is, after 
all, a collaborative exercise. 


How do! get involved? 

Go. Write something. Link it here when done under the 
"Project Documents" heading. Tag it with "heimdall". 
Hopefully, it'll stick, else it will be downvoted into deletion 
like any other work on the site. But hopefully it will stick. 


My reaction to this project is "Meh." 
That's fine; nothing on the wiki is for everyone. 


Requested Documentation 


FROM: General William Pendergast (Deputy Director of 
Foundation Contingency Planning Operations) 


TO: All Staff working on Project Heimdall 
RE: Requested Documentation 


The O5 Council has requested further documentation 
related to Project Heimdall (CPO 83910301). All staff 
should feel free to pursue any of these or other topics of 
research at their leisure. 


This is a list of ideas for tales, reports, etc. that might be drawn up in 
relation to Project Heimdall. Feel free to add to it if you have ideas 
you think might be interesting to see someone write on, or to remove 
topics if you write them up. 


Political / Economic / Social 


International Relations and Extraterrestrial Contact: United We 
Stand or Every One For Themselves? 

Selling to the Dead: Economic Ramifications of Extraterrestrial 
Attack 

Panic in the Streets or Keeping Calm and Carrying On: Public 
Reaction to First Contact 

Applied High School History: Lessons from the Conquest of 
the New World 

Public Disclosure Disorder: What Happens When the World's 
Most Well-kept Secret is Public 

At What Cost? Defining Ethics During an Alien Incursion 

Do We Have To? Working Alongside Other Secret Institutions 
and Agencies 

#Invasion: Use of Social Media in Damage Assessment, Risk 
Management and Recovery 


Military 


The Longest Supply Chain Ever Known: Logistics of A 
Planetary Invasion 

What Happens If We Can't Nuke Them? Planetary Strategic 
Defense 

Earth Needs YOU! Raising an Army in Armageddon 


¢ Strategic Division of Labor: Keeping the Super Weapons 
Secret 

¢ The Concerned Citizen: Taking Necessary Action to 
Circumvent Civilian Objections 


Natural Sciences 


¢ Our Microscopic Allies, or The Fourth Horseman? Biological 
Interplanetary Warfare 

* Know Thy Enemy: Xenopsychology and Planetary Defense 

Playing With Fire: Capability for the Reverse Engineering of 

Alien Technologies and Potential Risks Involved 

¢ The Coal and Uranium Would've Lasted Forever: Developing 
Power Generation Techniques to Empower Future 
Technologies 

¢ NOT THE BEES: Impact of Alien Biology on Livestock and 
Agriculture 


Anomalous Activities 


¢ Liability Liquidation: Ils "Destroy Destroy Destroy" a Necessary 
Step? 

¢ Asset Mobilization: Identifying and Using Anomalous Artifacts 
Capable of Assisting in Planetary Defense 

° Physics! Rapid Development in Alternative Sciences 

* Secure Contain Protect? Rethinking Foundation Priorities 
Under Fire 


Further Research on Extraterrestrial SCPs 


This is simply a list of SCPs tagged "extraterrestrial". If you 
wish to use them, be sure to contact the author first. 


SCP File #| Billith's Propos Research | TheBillith 
SCP File #| SCP-037 Research | xthevilecorruptor 


SCP File #| SCP-1050 Research | Hornby 


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SCP-1094-EX 


SCP-1107 


SCP-1121 


SCP-1124 


SCP-1276 


SCP-1281 


SCP-1375 


SCP-1396 


SCP-1411 


SCP-1417-J 


SCP-1426 


SCP-144 


SCP-1445 


SCP-1480 


SCP-1514 


SCP-1541 


SCP-1543-J 


SCP-1548 


SCP-1574 


SCP-1629 


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Research 


MrBazzle 
Dr_Madd 
Crayne 

(user deleted) 
Aelanna 
DrEverettMann 
Aelanna 
Aelanna 
DrEverettMann 
Smapti 

DrLevy 
FritzWillie 
Univine 
Eskobar 
Anborough 
Vincent_Redgrave 
name 

9Volt 

Roget 


Anborough 


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SCP-163 


SCP-1640 


SCP-1682 


SCP-1683 


SCP-1685 


SCP-1694 


SCP-1720 


SCP-1778 


SCP-179 


SCP-1795 


SCP-1812 


SCP-1815 


SCP-1843 


SCP-1923 


SCP-1935 


SCP-1941 


SCP-1947 


SCP-1958 


i P-1959 


SCP-1960 


Research 
Research 
Research 
Research 
Research 
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Research 
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Research 


Research 


Flah 
Accelerando 
(user deleted) 
Roget 
FlameShirt 
AstronautJoe 
Aelanna 

Dr Reach 

Dr Reach 
AstronautJoe 
Ihp 
Anborough 
Tagliafierro 
MisterBibs 
Dmatix 
Requitefahrenheit 
Zekky 

Smapti 

Dr Hendra 


Tiger66261 


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SCP-1960-J 


SCP-1980 


SCP-2001 


SCP-2002 


SCP-2004 


SCP-2005 


SCP-2020 


SCP-2027 


SCP-2033 


SCP-2040 


SCP-206 


SCP-2063 


SCP-2069 


SCP-2070 


SCP-2088 


= P-2092 


SCP-2100 


SCP-2154 


SCP-2222 


SCP-2226 


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Research 
Research 
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Research 
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Research 


Research 


dragonnyxx 
eric_h 
Bluedanoob 
Crayne 
SnakeoilSage 
Silberescher 
Communism 
tll win 
DrLucan 
Waterfire 
Nighkos 
Gene R 
WarpZone 
Aelanna 
Silmerion 
Roget 
TobiasTheTapir 
Abettik 
Blackbird5154 
acc1177 


Lesh 


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SCP-2229 


SCP-2237 


SCP-2270 


SCP-2276 


SCP-2362 


SCP-2399 


SCP-240 


SCP-2404 


SCP-2460 


SCP-2473 


SCP-2474 


SCP-2477 


SCP-2499 


SCP-2525 


SCP-2548 


SCP-255 


SCP-2575 


SCP-2578 


SCP-2580 


SCP-2585 


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Research 


Univine 
Agent 
icLeod 
djkaktus 
AJMans field 
Lesh 
djkaktus 


Roget 


Cyclopian 


WrongJohnSilver 


Agent 
icLeod 
Kalinin 
Petrograd 
weizhong 
TL333s 
TyGently 
(user deleted) 
Patrick 
1elan 
daveyoufool 


Zmax15 


Anborough 


Transcript of the conversation between SCP-694-2, 
SCP-694-3, and SCP-694-4: microphones and 
cameras are placed within the vehicle at the onset of 
the loop events. Superfluous dialogue redacted; full 
transcript available in Document 694-K-11. 

SCP-694-3: Jake! | got the kid! Hurry up! 


SCP-694-2: Nooo! Daddy! Daddy, help! 
<weeping> 


SCP-694-4: (kicking SCP-694-1) Lang! Message 
for you! "Nobody walks away." (gets into van) 


SCP-694-3: You got the map? | don't know this 
area. 


SCP-694-4: Yeah, hold on, there's one in the glove 
compartment. 


[SCP-694-3 begins to drive away from SCP-694-1] 
SCP-694-2: Daaaaddddyyyyy!!! 


SCP-694-4: (to SCP-694-2) Kid, if you don't shut 
up I'll give you something to fuckin' cry about! 


[SCP-694-2 begins weeping more quietly] 
[superfluous dialogue redacted] 
SCP-694-3: Which way do | go? 
[SCP-694-3 and -4 arrive at an intersection] 
SCP-694-4: Go down Street. 
SCP-694-2: | wanna go home! 

[A sound of breaking glass is heard] 


SCP-694-3: There's two streets that say that!@ 


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SCP-2624 


SCP-2631 


SCP-2651 


SCP-2667 


SCP-2670 


SCP-2686 


SCP-2713 


SCP-2716 


SCP-2735 


SCP-2762 


SCP-2775 


SCP-2777 


SCP-2793 


SCP-2798 


SCP-2813 


SCP-2821 


SCP-2824 


SCP-2838 


SCP-2845 


SCP-2859 


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Research 


TyGently 
sirpudding 
9Volt 
feathersnake 
djkaktus 
Wogglebug 
Doctor 
Lmmerian 
Tagliafierro 
Cyclopian 
Anaxagoras 
weizhong 
Chubert 
Praetor 
racyn 
Kalinin 
Doctor 


Lmmerian 
9Volt 


ignorant_genius 


minmin 
Djoric 


toastedraptor 


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SCP-287 


SCP-2886 


SCP-2894 


= P-2917 


SCP-2983 


SCP-2998 


SCP-3003 


SCP-3007 


SCP-3029 


SCP-304 


SCP-3067 


SCP-3068 


SCP-3070 


SCP-3083 


SCP-3098 


SCP-3109 


SCP-3179 


SCP-3200 


SCP-3201 


SCP-3230 


Research 
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Research 
Research 
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Research 


DrMagnus 
Multiscoop 
Guilliman 
Geomet ryPrime 
Sir Baubius 
Eskobar 
Communism 

tll win 
Zhange 
Geomet ryPrime 
Dr_Adams 
acc1177 
Tufto 
9Volt 
TL333s 
Bentu 
FortuneFavorsBold 
Tanhony 


weizhong 


9Volt 


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SCP-3278 


SCP-3279 


SCP-3321 


SCP-3365 


SCP-3417 


SCP-3473 


SCP-3485 


SL P-3527 


SCP-3599 


SCP-3632 


SCP-364 


SCP-3641 


SCP-3655 


SCP-366 


SCP-3696 


SCP-3747 


SCP-3909 


SCP-3918 


SCP-3965 


SCP-3994 


Research 
Research 
Research 
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Research 


Oystershell 
duodude55 
Xyteran 
Beeso3 
9Volt 
Yohan-Gas-— 
isk 
not_a_seagull 
DrCaroll 
Pedantique 
Quantum 
1ysician 
Quikngruvn 
DrCaroll 
JRollerball 
agatharights 
Doctor 
illmann 
not_a_seagull 
Communism 
tll win 
Pecan 


Anborough 


Dog Teeth 


ae 
. 


SCP File #| SCP-930-J Research | Decibelles 
Contact