A/N: so this is my first attempt at doing a crossover..so please don't mean..um yeah so here's the fic..i do not own avengers or Percy Jackson. enjoy!

Tony is in his workshop working on another suit or a design for another suit when JARVIS says something to grab his attention.

"sir there appears to be something coming down from the sky multiples of them" JARVIS informs Tony.

"another alien attack?" Tony asked worried as he rushes to find Pepper.

"I am not sure sir. They seem to have human ratings but I am detecting something else that is not human" JARVIS tells him.

"aliens why didn't you just say that instead?...JARVIS contact Pepper and tell her to get to some place safe" he says rushing down to where the other group of Avengers were hanging out.

"yes sir" JARVIS says.

Tony runs down to the living room seeing Natasha and Clint doing paper work, Bruce working up an idea and Steve in the kitchen making something.

"guys get in the jet and get ready for whatever is coming" Tony tells them

"why whats going on now?" Bruce asked

"I'm not sure exactly. JARVIS told me he detected something human but not human..so lets go figure it out" Tony says.

They nodded and the others run over to the room holding the jet as Tony walks outside.

"JARVIS send out a suit" he says

"yes sir" JARVIS says as a suit flies toward Tony and starts attaching itself to him.

"alright lets see what we got" he says as he boost his way up to the sky and his scanner starts to pick up whats falling from the sky and see its human bodies.

"people? No they're kids..what is going on" he says flying in that direction as he accelerates for more speed. "guys..they are a couple of kids falling from the sky I might need your help getting them and possibly taking care of uh..." he says as his scanner picks up the monsters. "whatever these monsters are"

"right. How many kids?" Natasha asked

"uh lets see there's two in front of me..about three to my left and about another three to my right" he says

"on it" Clint says turning the jet in that direction.

"I'll send you to the ones on the right we'll get the ones on the left" Natasha tells Bruce.

"alright so turn into the other big guy then" Bruce says.

"sir I'm detecting a sudden change in the weather you might want to be careful" JARVIS informs him

"what sort of change JARVIS?" he asked

"it's getting rather overcast and I'm detecting some electricity coming from the sky" JARVIS replies

"right a thunderstorm...Thor what are you doing at a moment like this" Tony says as he catches the two boys quickly as a flying pig chases after them and he shoots it with a couple of little missile from his shoulder. "guess we can't use the ' until pigs fly' phrase anymore" as he flies back to the tower.

"Tony is everything okay?" Pepper asked worried

"yeah just catching a couple of falling kids from the sky. These monsters that are after them don't seem too bad so I don't think we're in any real danger" Tony replies.

Clint flies the jet over to the first three which are girls and Bruce jumps down as he turns into the hulk catching them and lands where there are no people or cars. Then Clint flies over to the other three which are boys but narrows his eyes as they don't look like they're going to make it.

"Natasha...take over the jet for me..I'll get them" he says.

She nods and gets in the driver's seat, as Clint aims an arrow to the nearest building and it hooks on and he jumps down holding onto the wire, swinging over to the three boys but only to see one grabbing both of the other two boy's hands and them slowing down a little as he catches them.

"don't worry kid I got you guys" he says

"huh?" the blonde boy asked confused and somewhat dazed

Clint swings back over to the ship as the doors open and they get inside and he puts them down carefully.

"relax we'll explain everything when we get to the tower" Clint says as the blonde boy passes out.

"what were kids falling from the sky about?" Natasha asked wondering

"I have no clue..." Clint says

Natasha, Clint, Steve and Bruce head back to the tower with the six kids and sees Tony putting the two boys down on the couch.

"what are we doing with these kids?" Natasha asked helping Clint put the other three down on the other couch and Bruce turns back to normal putting the three girls on another couch.

"well first we got to find out what the hell happened with them, where they come from and I guess we go from there" Tony says

"sounds like a good plan. I'll make some food" Steve says

"it sure is getting dark all of a sudden" Natasha says.

"JARVIS whats the weather this time?" Tony asked.

"I'm afraid it is still rather overcast sir, but im detecting some weird ratings from in front of the tower" JARVIS replies

"venti's..." the blonde boy mumbles and they all look at him.

"venti's?" Tony asked.

"sir I believe that is latin for storm spirits" JARVIS informs him

"so Thor now has storm spirits?" Tony asked confused

"I don't know anything about a Thor but they're creatures of chaos they were locked away in Aeolus's chamber but are created by Typhon" the blonde boy says waking up.

"Aeolus? And they were created by a giant snake?" Tony asked

"Aeolus is the master of wind and wind gods and I guess you can say Typhon is a snake but he's more like a storm giant and creator of all monsters" the blonde boy says looking around confused

"so we pissed off a wind god great" Tony says

"no more like me and my friends probably pissed off the Gaia" he says

"mother earth?" Natasha asked

"y-yeah we were in a war...wait where am I? I was in the Argo 2..." he says confused

"great another war for us to fight" Steve sighs.

"the Argo 2?" Tony asked

"yeah it's a giant ship my friend built to get us across to Rome" the blonde boy says

"oh cool! Who is this friend of yours I would like to meet him" Tony grins

"Leo Valdez..." he says pointing to the boy with elf looking ears and brown curly hair

"this kid? Built a giant ship?" Tony asked not convinced

"oh trust me..you havent seen the things Leo could do" he says. "now would people tell me where the heck am I?"

"sir I'm afraid these storm spirits are trying to get in the tower" JARVIS informs tony.

"you are in New York inside the Stark Tower" Tony smiles

"the Stark Tower?" he asked confused

"yes. Do you not know who I am?" Tony asked, he shakes his head and Tony looks shocked. "how could you not know me? I'm famous"

"Tony he's just a kid probably from another state" Natasha tell him

"I'm Tony Stark use to be famous for the weapons I built-in Stark Industries but now I'm know as Iron man" Tony says, the kid looks even more confused.

"how about we start with introductions first. Tell us who you are and where you come from" Clint says

"Jason..Grace. I was from California but moved to New York, Long Island but now on the way to Greece or was on the way..." Jason says

"if you moved to New York then you had to have heard about me" Tony says, Jason shakes his head.

"just forget it Tony. I'm Natasha Romanoff" she says.

"are you Roman?" Jason asked

"no I am Russian. I'm also known as the Black Widow" she says

"oh..." he says

"I'm Clint Barton also known as Hawkeye" Clint says

"Steve Rogers also know as Captain America" Steve says

"Captain America?" he asked confused, Steve sighs

"you'll find out why when he puts his suit on" Tony grins

"I'm Bruce Banner known as the Hulk" Bruce says

"and the voice coming from out of nowhere" Jason asked

"oh that's JARVIS my AI...he helps around in the tower. JARVIS say hello" Tony says

"hello Jason" JARVIS says

"so Jason what were you doing falling from the sky?" Natasha asked

"I don't know..like I said I was on the Argo 2" Jason says

"sir the storm spirits are going to break in" JARVIS informs them

"I got this.."Jason sighs and they look confused.

He goes outside and focuses on sending the spirits back to the sky when a lighting struck the ground.

"dad im trying to save these nice people!" he yells

"Thor's your dad?" Natasha asked confused.

"huh Thor? Who's that? My dad is Zeus god of lighting and king of all gods" Jason says

"but Thor is the god of lighting. Okay what exactly is going on" Clint says

"I'm a demigod.." Jason says

There was a sudden flash of lighting as Thor appears on the balcony and walks down to the living room where the avengers and the kids are at.

"Thor what are you doing here" Natasha asked

"some man came to Asgard claiming to be the god of lighting and came with a message" Thor says.

"but he is god of lighting. Zeus..." Jason says

"NO!" Thor yells as it echos all around the Stark Tower. "I am god of lighting! no one else can be god of lighting" he yells about to throw his hammer down.

"Thor...no!" Tony says as Thor looks at him

"don't put your hammer down..your going to cause an explosion" Steve says

Thor sighs and calms down not throwing his hammer at the ground and looks at Jason.

"you little blonde man..why do you say that this Zeus is god of lighting?" Thor asked

"it's Jason..and well because he is..where I come from" Jason says, Thor looks at the others for an answer.

"he says he's from here. New york" Natasha says, Thor looks at Jason.

Jason looks confused as to why they don't get what he means then Jason realizes that these are mortals that never heard about the Greek gods.

"um Thor right?" Jason asked

"yes that is my name little man" Thor replies

"where are you from?" he asked

"I am not from this planet. I am from Asgard" Thor replies

"Asgard?" he asked confused

"it's a planet in space" Tony says

"ah okay...um well the New York I am from..Zeus is the Greek god of lighting but from the camp I was originally from. He is known as Jupiter" Jason explains

"what camp?" Clint says.

"there's two camps. The one I was originally from is the roman camp for kids like me..um demigods, then there's the Greek camp the one I moved to and uh same for kids like me" Jason says

"demigods.?" Bruce asked

"uh yeah. Each demigod would have one godly parent and a human mother or father. So we are part god and part human" Jason explains. But they still look confuse. "okay Greek gods..look them up. They go around being with humans and have us, sometimes we have to help them fix things..which we call quests.."

"alright we have to do some homework. JARVIS pull up the information about the Greek gods" Tony says

"Yes sir"JARVIS replies

"okay before we get to that. What is this message Thor?" Tony asked

"there is a war upon us filled with monsters that we do not know of..." he starts

"that would be the monsters from my time. I guess we pissed Gaia off more than I thought" he says

"but that's not all. The Chitauri's are going to have another war as well saying something about having a new and stronger force to side with" Thor continues

"that's not good. I don't know what the Chitauri's are but if Gaia's siding with another force that is bad" Jason says

"there is more isn't there?" Clint asked.

"yes as there is war with Chitauri's . Loki is not safe in the Asgardian prison cell. I ask of you to watch over. Him. He is under a spell so he wont cause any trouble" Thor says

"fine. very well. First we get Loki then we do our homework" Tony says.

so here is my first attempt Percy Jackson crossover avenger fic. for now this one be a one shot ish fic unless i get reviews. so let me know what you guys think of this fic. do you like it and want me to continue. R & R thank you~