Quite simply as it says it says in the title, in your eyes who are the best created and most terrifying sci-fi antagonist groups. To clarify what I mean by "groups" I mean not an individual villain like say Emporer Palpatine, I mean a collective species, type of people or organisation from a specific series, I'll give some of my favourite examples.
Replicators (Stargate SG1)
The Replicators are both terrifying and brilliant for so many reasons.
They're essentially a mindless horde of drones with a single minded purpose, to replicate regardless of the cost to other life, impossible to be reasoned with. They can create more of themselves out almost anything and will just keep coming at you with no fear. To add to this they are capable of collectively evolving and adapting to new threats, but in a logical and plausible way (Unlike the bullshit Borg in Star Trek "every couple of minutes "They've adapted" -_-, by essentially being made of lots of small identical blocks and able to create themselves in infinite forms and despite their individual mindlessness their collective mind enables them to target and exploit weaknesses very efficiently. Plus they're robotic lego spiders from space, how is that not scary?
Reavers (Firefly)
The Reavers at first glance may not seem that special, but when you break it down they are just truly terrifying. Showing up out of nowhere from the black of space, they're beyond the madness of a traditional psychopath, savage tribe or evil villain, driven to acts of such sheer depravity and completely incapable of any emotion, beyond rage, beyond insanity, except what makes this behaviour even more terrifying is the fact that they are still capable of flying spaceships, developing weapons in the future that seem almost medieval yet still effective at their purpose of maiming and disabling a victim so they can be taken alive. They're even capable of basic tactics and planning (the way they try to flank in Mr.Universe's station, targeting small settlements) though still easily out-smarted. It's this blend of zombie like hording, conscious insanity, pure savagery and "campfire story" status among most of society that makes them such brilliantly terrifying antagonists.
I think this quote from the show sums it up nicely
Zoe - "Haven't you ever heard of Reavers?"
Simon - "Campfire stories, men gone savage on the edge of space"
Zoe - "They're not stories"
Simon - "What happens if they board us?"
Zoe - "They'll rape us to death, eat our flesh and sow our skins into our clothing and if we're very very lucky, they'll do it in that order"
The "if we're very very lucky, they'll do it in that order" just adds so much weight to the terror the speech is designed to induce.
Replicators (Stargate SG1)
The Replicators are both terrifying and brilliant for so many reasons.
They're essentially a mindless horde of drones with a single minded purpose, to replicate regardless of the cost to other life, impossible to be reasoned with. They can create more of themselves out almost anything and will just keep coming at you with no fear. To add to this they are capable of collectively evolving and adapting to new threats, but in a logical and plausible way (Unlike the bullshit Borg in Star Trek "every couple of minutes "They've adapted" -_-, by essentially being made of lots of small identical blocks and able to create themselves in infinite forms and despite their individual mindlessness their collective mind enables them to target and exploit weaknesses very efficiently. Plus they're robotic lego spiders from space, how is that not scary?
Reavers (Firefly)
The Reavers at first glance may not seem that special, but when you break it down they are just truly terrifying. Showing up out of nowhere from the black of space, they're beyond the madness of a traditional psychopath, savage tribe or evil villain, driven to acts of such sheer depravity and completely incapable of any emotion, beyond rage, beyond insanity, except what makes this behaviour even more terrifying is the fact that they are still capable of flying spaceships, developing weapons in the future that seem almost medieval yet still effective at their purpose of maiming and disabling a victim so they can be taken alive. They're even capable of basic tactics and planning (the way they try to flank in Mr.Universe's station, targeting small settlements) though still easily out-smarted. It's this blend of zombie like hording, conscious insanity, pure savagery and "campfire story" status among most of society that makes them such brilliantly terrifying antagonists.
I think this quote from the show sums it up nicely
Zoe - "Haven't you ever heard of Reavers?"
Simon - "Campfire stories, men gone savage on the edge of space"
Zoe - "They're not stories"
Simon - "What happens if they board us?"
Zoe - "They'll rape us to death, eat our flesh and sow our skins into our clothing and if we're very very lucky, they'll do it in that order"
The "if we're very very lucky, they'll do it in that order" just adds so much weight to the terror the speech is designed to induce.
