[Virtualpersonal, Fetish] Having left the safety of their isolated cabin to fight against evil, Sam and Dean fully expect trouble from hunters who might suspect Sam is not human. What they find is that Sam is being targeted alright, but Sam's memory lapses make it impossible for them to figure out by whom or what.

[HazelDomain] Cas has always been happy with his pet alpha, Dean. Only now he's ended up with a second alpha, Sam, and the two of them are going to break everything he owns. The solution seems obvious; they wouldn't fight for dominance if Sam was an omega.

[BewaretheIdes15] After the fallout from "Finding the Balance", Dean has something special planned for his 'alpha' - it's going to be a long night for Sammy. (Werewolf Porn 6)

[BewaretheIdes15] Another wolf wants to join the pack and it might cost the Winchesters everything. (Werewolf Porn 5)

[BewaretheIdes15] Dean may have a collar around Sam's neck, but that doesn't mean Sam's going to take Dean's flirting lying down. (Werewolf Porn 4)

[BewaretheIdes15] Sam's not happy with the way Dean's controlling his wolf side. It's time for a lesson in control, Wincest-style! (Werewolf Porn 3)

[BewaretheIdes15] Sam may be his alpha, but Dean's going to show him exactly who's in charge. (Werewolf Porn 2)

[BewaretheIdes15] Dean's been bitten by a werewolf and as the full moon approaches Sam has to make his brother see him as his Alpha... by the sexiest means necessary, of course. (Werewolf Porn 1)

Benny and Sam are both alphas, but Benny's got a little kink that Sam likes to indulge in every now and then.

Newton's law of universal gravitation states that any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between the two bodies. Police officer Dean Winchester swears he feels an honest-to-goodness gravity (not any scent-true-mates-bullshit) pulling him to a mysterious omega in the holding cells and makes the worst mistake of his career. He only has one thing to say... Fuck science.

[PaperAnn] For the most part, omega Dean got along with everyone. Or at least could fake it. Dealing with alpha Castiel Novak was a completely different story. He hated him on paper: slut, hard drug user, street drug seller, who knew what else was on that list. But he wanted him. Bad. Meanwhile, his alpha brother Sam might be hooking up with his boss Gabriel, another alpha, and maybe there's more going on with them than meets the eye, too. (Master Post)

[SPNkink-meme] Dean wants John to turn him into an omega so he and Sam won't clash, but Sam disagrees. He wants to be Dean's omega.

A society where all siblings present the same. After Dean presents as an omega, John sells him and Sam to a blue-eyed alpha. Dean's more worried about Sam getting abused than himself.

Angels mate for life. But angel mates are not necessarily a single pair. Alphas bond with each other, but they don't become a family unit until an omega is part of the nest. Once that happens, the family unit is locked in for eternity. Sam has met the alphas he wants to spend eternity with. Michael, Lucifer, Castiel and Gabriel are already pretty set, but they always knew they were missing someone. Every one was surprised to discover Dean was an omega.

[Moosefeels] When Dean presents as omega, his pack brands him and abandons him. Castiel's pack finds him and gives him a new home.

[Virtualpersonal, Fetish] A mysterious healer finds an injured Dean in the woods and takes him in. Seven years ago, he was Samuel Colt, hunter. Samuel Colt died in those woods. Now he's just Sam.

[Capzi] The Winchesters are no strangers to sacrifice of the highest order, but the opportunity to bring home all the angels presents a unique set of challenges. Featuring Dean's unexpected hurt in his new relationship, Castiel's attempts to keep the peace, and Sam's bloated, sugar-craving, nauseous, mood-swinging desperation to just get through the next nine months, dammit. Buck up, boys. We've got an abomination on the way. (Gabriel/Sam only in separate linked chapter.)

Sam always wanted to be Dean's omega, but he turned out alpha. But he's never been one to let something as simply as biology define him. And what he wants is for Dean to be his alpha anyway.

[hellhoundsprey] Nobody could have expected that and how very bad it would happen. But it does, and oh; it's that road of no return you will roll down with a smile on your face and your beloved one's hand in your own - and you will be free from fear. (Hunter John and his son Sam turn to a reclusive pair of hunters, Benny and Dean, with an unusual way of hunting vampires. But from the first moment Sam smells Dean, there's more than the hunt at stake.)

[AnnaNocturnal (girlgotagun)] Sam is an Alpha, like the rest of his—maybe dysfunctional—pack, until he’s kidnapped and turned into an omega as revenge for the vampire Luther’s death. After rescue, Sam is overwhelmed, his nerves chafed by his now smothering and over-protective pack. His mind is already bucking against his changing body and new instincts, but then the other shoe drops—Dean is Sam’s true fated mate. Sam bolts, taking off in the night, and ends up stuck in a backward town where omegas—particularly males—are treated as property, awarded to the last Alpha standing in a grand public spectacle of won dominance. Dean manages to find Sam in time to save him, but at what cost? (Also archived at http://girlgotagun.livejournal.com/13311.html)

[deanwithwings] Dean's been passing as a beta for years, until a bar fight and his own father leaves him high and dry without his pills in jail. Since omegas have no autonomy he has to be placed in a home and trained up in the proper behavior of a polite omega. Thankfully he lands a great case worker that manages to get him into a traditional Japanese-style school. Dean isn't pleased with this but since the only other option is a state-run mental hospital, he decides to go along with it until his father breaks him out.

Cas is learning to be human. Turns out being human comes with being an omega, and being an omega comes with going into heat. His first heat ever. He requests Sam and Dean's assistance in relieving it... and in giving them all a gift.

Hiding things, even from each other, is the Winchester way. John thinks both his sons are betas, but only Sam knows the full truth. He's an alpha and his brother is an omega. Stanford is looming and the only way Sam can take Dean with him is to mate and breed him.

Since Dean hit puberty, he's kept a secret from Sam, but with the final onset of his physical maturity and the loss of his father, it's all too much and he breaks down.

Dean Winchester never wanted to go home again. Going back to Lawrence meant people who knew what he was, who didn't buy into the lie. But with a tragic accident, he's back and dealing with the death of his father, the social stigma and objectification of being an out Omega, and the lingering aftermath of a long-ago crime.

[almne] Dean really hates freakin' witches. When Sam is abducted and tortured by one, Dean manages to get him back... but something's different about Sam now. Maybe it's the way he doesn't smell or act like an alpha anymore, but like the most delicious, submissive, obedient omega ever. [Sadly abandoned, but there was at least a part 2, found here: http://take-the-knot.livejournal.com/47729.html]

Sam Winchester just wanted his life to be as straightforward and normal as a witch's could be. After all, it was hard enough getting into university as a broke non-human Alpha without getting involved in a murder case. Unfortunately, when the supernatural police come to arrest him for murder, he's left with little choice but to prove his innocence. At least it doesn't hurt that Detective Castiel is a looker.

It was a well-known fact that alphas never got ill, but Dean, an omega-rights working alpha, falls ill one night - it's up to Sam to work out how this happened and why Dean won't let anyone help him.

[lysanatt] Captain Sam Winchester is the only alpha in a full squadron of omegas. Usually it is not a problem for Lucifer, the commander of the dragon riders; the young captain is talented beyond belief, unusually polite and respectful. But when Lucifer goes into heat, Sam challenges his command. Lucifer cannot let it slide, not without... consequences.

[Etoile Etiolee] Dean is an omega. Since puberty, John has insisted that he takes suppressants because he does not believe Dean can be respected amongst hunters if they learn about his status. Stuck between an alpha father and an alpha brother, Dean struggles to find his place in the world. That is, until John forces him to take some life-changing decisions when he throws him out. Joining Sam at Stanford, Dean comes to term with his own needs and identity, while Sam waits patiently for his brother to realize that they are mate. What happens after... well, a lot, but Sam and Dean are together. Dean can deal with anything, even an unexpected pregnancy, with his brother by his side.

[FictionalNutter] In a universe where all are born alpha and omegas are created by 'turning,' Sam has never feared the possibility because his brother would never hurt him. But when John finds his acceptance letter to Stanford, he does the unthinkable and turns Sam anyway. Dean walks in too late to stop the transformation, but not too late to help Sam anyway.

Castiel has lived a sheltered life tucked away in the high society of Savannah, Ga. When his mate dies in childbirth Castiel is left with a daughter to raise alone and a home that is just too big. At the suggestion of his family he enters the world of Omega claiming and discovers that perhaps his real mate, his one true love is a tall green eyed stunning Texan. The man is a stranger and yet as they navigate this new relationship together he finds out that sometimes you have to just enjoy the cherry pie.

Of course the day Sam forgets his phone at home is the day Castiel starts his heat early.