This is awesome! I'm going to playtest it right away and see if I can find some grammar and spelling corrections for you to make.

Ich danke Ihnen für diese! (Not sure if my German is really that great either, so don't worry about a few mistakes).

Also, I think Guardian should be Watcher in the English translation. Aspirant should be Potential, short for Potential Slayer. That's what I have so far.

Teen:
1. Dreamer, Mo-Th 9pm-0, 10$
You never needed much sleep. And you never feared the darkness. But when you sleep, you dream of monsters and other strange things, which sometimes becomes true.
2. Potential, Requires 2 Body, 1 Logic, 1 Creativity, Mo-So 5pm-2am, 50 $
A Watcher called you. Now you know why you’re not like other girls. You’re going to be the Slayer. Until then, your Watcher awaits you every day for teaching and training, to prepare you for your struggle against the forces of evil.
3. Slayer, Requires 1 Charisma, 3 Body, 2 Logic, 1 Creativity, 1 Cleaning, 2 Friends, Mo-So 5pm-2am, 150 $
It’s time now. Though it’s a disturbing thought, the last Slayer has died and now you’re the chosen one. You have to keep on training but you must also reckon with more vampires and demons, who want to fight with you, because the creatures of the night are fascinated by the Slayer, though they fear her.

Adult:
1. Dreamer, Mo-Th 9pm-0, 10$
2. Aspirant, Requires 2 Body, 1 Logic, 1 Creativity, Mo-So 5pm-2am, 50 $
3. Slayer, Requires 1 Charisma, 3 Body, 2 Logic, 1 Creativity, 2 Friends, Mo-So 5pm-2am, 190 $
4. Prophecy Girl, Requires 3 Charisma, 5 Body, 2 Logic, 3 Creativity, 2 Friends, Mo-Sa 5pm-2am, 298 $
You’re more successful, than many of your ancestors. Your Watcher found out that you may be the subject of some old prophecies, saying that you will fight against a very old and mighty vampire. The result of this fight has yet to be discovered.
5. Saviour of the world, Req. 4 Charisma, 6 Body, 4 Logic, 4 Creativity, 2 Friends, Mo-Sa 5pm-2am, 503 $
With great sacrifices you were able to prevent the apocalypse. To get over your loss, you'll need good friends. And you must be aware of the fact, that evil has many faces. Be prepared for your next enemy.
6. Destroyer of pure demons, Req. 3 Mechanics, 4 Charisma, 6 Body, 5 Logic, 6 Creativity, 4 Friends, Mo-Sa 4pm-2am, 772 $
Pure demons are rare and very hard to fight. With this risk in mind you fought much harder, and smarter. As a result, you didn't suffer too many losses. Only your former school principal didn’t know when to talk and when to run and was eaten by a giant snake.
7. Special Member of the Initiative, Req. 5 Mechanics, 6 Charisma, 8 Body, 7 Logic, 7 Creativity, 6 Friends, We-So 4pm-1am, 834 $
You have the attention of the Initiative, a secret government project, researching about so called “Sub Terrestrials.” But their methods seem weird. You only kill demons actually posing a threat to the human populace. The Initiative catches even harmless demons and does experiments on them. Try to figure out what the scientists' plans are, but don’t forget your duties as the Slayer.
8. Keeper of the Key, Req. 2 Cooking, 7 Charisma, 8 Body, 7 Logic, 8 Creativity, 3 Cleaning, 6 Friends, Mo-So 3pm-2am, 794 $
The Initiative was counterproductive but now you have greater problems. It seems like your little sister hasn't existed for more than two months. Your Watcher found out that she is the key to a strange dimension that was given a human form. Whether it’s true or not, you love your sister and you have to protect her from all these creepy demons that are after her now.
9. Teacher of Potentials, Req. 4 Cooking, 9 Charisma, 9 Body, 7 Logic, 8 Creativity, 4 Cleaning, 8 Friends, Mo-So 2pm-2am, 956 $
Your sister is no longer a target of demons because she’s not the key anymore. Instead, the servants of the First Evil hunt the aspirants, to wipe out the line of the Slayers. You must protect the girls that come to you from all over the world and prepare them for the last battle.
10. One of Many, Req. 4 Cooking, 9 Charisma, 10 Body, 9 Logic, 10 Creativity, 4 Cleaning, 9 Friends, Tue&Thu 6pm-10pm, 1780 $
The site of the battle is totally destroyed, but the most dangerous attack of evil, since the beginning of the world, is over. With the help of a mighty spell did all the Potentials get the powers of the Slayer. You can rest now or fight against the remaining servants of evil, as you wish. On the plus side you won’t have money issues anymore, because the evil destroyed the Watcher's Council and your Watcher, as the last one remaining, has control over their accounts.

Thank you for your reply, Elyasis. I made the corrections, you proposed and uploaded a new version, where you're a Potential, teached by a Watcher.

Great career, but I do wonder, is that bat icon meant to be ironic? Since Dracula is the only vampire that changes into a bat in the series and even that is a cheap magic trick..

Hey Terrydy, I'm glad you like the career. I know that there hardly appear any bats in the series but it's still my first connotation when I think about vampires. But if it really bothers you, I could make another icon. Do you have any suggestions?

I'm not Terrydy, but I made these two right off the bat, because I thought they might fit. Cause you know, stakes.
If you hate them though, you can always say so and I'll make another or re-edit so it suits your needs. Just pick the one you like.
Also: Thank you for the download! And congrats on your first upload!

Thank you for the great icons. I've choosen the blue one because it fits better with the other maxis icons and uploaded a new version that uses the stake instead of the bat (v3).

Thank you! I've been looking for something just like this!

Works like charm!Thank you!

If this is as good as it seems, please make male slayers as well!! <3

Oh, it's not for ts3.. Make for 3 <3

So awesome! But I can't get it to show in English!

Hello BelovedDoll. Are you from UK? It seems I copied the wrong strings, so that every language version but the AE one would show up in German. Sorry for that. I deleted all the language strings but the German and the AE and as the last one is the default, it should show up in English now for every one, who has not the German game version. If not, tell me and I'll try to fix the problem.
Summarizing: Version 4 should show up in the right language and has also some corrections of wrong results of chance cards of the teen career.

Hello christinaart. I'm sorry but I don't own Sims 3, so I can't make a S3 career. But if you want, feel free to convert it and upload it, just with a little hint to my original career
Concerning male slayers: As the career is based on Buffy, male slayers don't exist in that way and I also think that the chance cards wouldn't fit that well for male sims. But if you have any ideas about how to add "canonical" male slayers, I'll do so. In the meantime I would recommend Lilly Windsor's Watchers' Council career. As a Watcher your male sims can fight the forces of evil, too.

Do you use all of these 4 files? I did not see where it said.

No, you should use only one of them. It's not that bad if you download all, but as they all have the same GUID, they overwrite one another. Version 4 is the last one and has the most corrections, but you could also use version 2 if you prefer the bat Icon. You can check the previous comments for more detail.

This is awesome! Thanks

MUINTO OBRIGADO