So I've developed a universe and was trying to figure out the story and what in general happens. I had an "enemy group" or several, but I largely ignored creating antagonists... and then it hit me... Every good story has a good antagonist (or several)! It's all good to have a faceless enemy group, but it doesn't really lend itself to drama when you take it to a personal level.

So this leads me to the question... What do you look for in antagonists or antagonist groups?

This sounds like a great topic that I will follow closely.

My project is an RPG that features 5 main groups, all of which at points are antagonists or "evil" at various parts of the story.

My first big writing decision was to really try to make sure their motivation was clear. What do they really want? What is driving them to be "evil" or antagonistic? It has to be rational and believable unless they are just completely insane or chaotic (for me at least).

Then I tried to make sure that motivation was tied to the world they lived in, so they really feel like part of the world instead of dropped into it as an afterthought.

I also like the occasional faceless individual. A villain who you keep on hearing about, or who you only see masked, who give themselves a name that hints at their nature but with a twist to it. They also have some unusual power that makes them extra deadly.

In Isaac Asimov's Foundation series, one of the books contains a military-genius usurper who seizes control of a few planets and is rapidly gaining power, and who calls himself "The Mule". The protagonists assume (because of propaganda) it's because he's brutishly strong, but in reality he's rather frail and lanky, and calls himself The Mule because of a genetic mutation that gives him his mental powers but also makes him sterile (mules are a cross between donkeys and horses, and are usually sterile).

In the book Players of Null-A (another sci-fi), the protagonists are fighting against an emperor trying to take over the galaxy (a common trope), but the emperor's dragon is a guy who calls himself The Follower, who has the ability to "phase out" of physical presence and become immaterial with a shadow-form. Towards the end of the book, they realize that The Follower's abilities were caused by an accident when he was young involving the high-tech computer systems the religious order in that area worships but don't comprehend, and that The Follower is actually the high-priest and is a zealous fanatic who actually believes in that religion, thinking that his abilities were given to him by divine intervention since the accident occurred in the main "temple area" of the high-tech spaceship they worship. The name The Follower is a not-so-subtle underlining of his own religious loyalty.

A name without a face can create quite an impression.

I agree with Got_Rhythm. I look for a realistic or compelling reason for whatever they are doing. For me, the stories that are truly great demonstrate growth and change in both the protagonists and the antagonists. If you're interested, the following link is a good resource for figuring out what type of antagonist(s) you wish to include in your story: http://tvtropes.org/pmwiki/pmwiki.php/Main/Villains . Best wishes!

Definitely a great question. According to a few books on strategy and how leaders provoke their teams to commit to battle and taking sides against a common enemy, there are several criteria that would allow for a dedicated "antagonist group". When the basic needs of people are at risk, humans instinctively become defensive and wage war against that which is adding this threat to their way of life, whether in an organized physical manor, or mentally. This building rage will either subside or become stronger depending on the magnitude in which the threat continues or progresses. If this threat is strong enough, the desire to fight back will eventually win. If there are more than one person that this threat is effecting, common solidarity will draw them together and a group may then be formed to battle against this threat.

It is best to have a common idea or entity to call your "enemy". This way, the army, or group, will have a concrete set of values as to "why" they are against this idea / enemy. Often times, things that cannot be seen are often great methods to use to wage war, or convince a group of people to dedicate themselves to a set of values. You can see this taking place in the Middle East with Muslims and Christians. Religious zeal trumps commonly held values because of the deep belief system that comes along with these. If someone's religious freedom or god is attacked, a war may be waged, people will die for their cause, etc.

I hope this was a decent example and not too abstract.

It seems to me that coming up with individual antagonists are fairly easy. You just need someone to throw a wrench in whatever plans the protagonist has and this can stem from "because I felt like it", "because I really like you but can express it", "because it's my duty", "because if I let you do this it will cause problems for me", "because my god says so", "because your beliefs are bad", "because you are inferior", etc... and coming up with enemy groups is likewise pretty simplistic as all you need is a reason to rally multiple people behind which can be all of the previously mentioned + communal reasons such as "If we don't get your resources we'll die" or "You hurt someone we know so now we hurts you" or even something as simple as "this be our territory!"...

And since all these are very basic and can all be messed up, the harder question is, what changes an antagonist from some generic character to something memorable. And in groups of antagonists how do you balance the group and since each individual antagonist is different (in most cases) what are good combinations of these personalities, beliefs, etc? Is a random mixing of memorable antagonists as good as any other, or is there a best, or best in a given situation, mixing?

Creativity and uniqueness. -The first time I watched Darth Vader in the original Star Wars movies, it felt unique. He felt so mysterious up until the end.

-Give him traits. It doesn't have to be heavy breathing, but really think of something.