Just when Percy Jackson thinks life is calming down after the defeat of Gaea, he finds himself confronting a mad geneticist who's mutating sea-life and has to work with a certain alien shapeshifter to take him down.

When the worlds of Percy Jackson and Ben 10 collide, crazy stuff is bound to happen. Join Percy, Annabeth, Ben and Gwen on an incredible journey which might just question everything they've known till now.

Being transported to a world different from his, Percy discovers a way to defeat Kronos in his original world. The problem? The solution to his problem is wrapped around the wrist of a 10 year old kid who's guardian is more than unwilling to allow the kid to save Percy's world. Going through drastic measures, he strives to find a way to obtain the key, making unusual allies.

What originally was supposed to be a fun trip for the summer has instead diviluged into something entirely different. Their lives being changed forever all because of a watch, and the werid things that it can do.

¿Piensas qué ser un semidios es cool, no? La verdad es qué, evitando la constante posiblidad de qué algún monstruo mitologico o aliengena envié tu trasero directo al más allá, lo es. Pero sí estás leyendo ésto, es porqué o eres un semidios, o de el espacio te llegó algo muy especial. Atentamente: "Ben 10" Cabaña 4, Deméter

Finding out he is son of a Goddess and a demigod, Ben Tennyson sets out to help his friend Percy Jackson with retrieving Zeus' lightning bolt, before the world turns into a battleground of the Gods. Once more, pushed into a new world, with new challenges, new threats, testing the mettle of his resolve and ability to survive.

After seeing Gabe murder his mother, Percy Jackson runs into the woods, where he finds the Nemetrix. Shortly after, he is found by the goddess of the hunt, and is accepted into her group.

Before finding out he's a demigod, Percy finds Ben 23's omnitrix. Look out Camp Half-Blood, Percy 23 is on the job.

Join Percy Jackson, Ben Tennyson and the gang as they fight bad guys and save the day with super powered watches strapped to their wrist. Takes place during the original Ben 10 series and two years before The Lightning Thief. Rated T for paranoia

please read as i have not read or found a story like this and would like to, if you have found a story like this could you please send the name of the story to me or send this challenge to a author you think would be interested in giving it a try

The seven halfbloods are preparing to sail to Athens and defeat Gaea, but now they need extra help. Can Ben, Kevin, and Gwen help them defeat Gaea's minions? Take place after the House of Hades and Ben 10 Alien force. Mostly Gwevin *On hiatus*

Percy and Ben are kidnapped and taken to a place for entertainment. Percy and Ben become friends and work together to escape there new prison.

When I was looking up crossovers of Ben Ten,and Percy Jackson there was no stories where Ben is a Demigod so I pick the only one of the Big three that didn't break the oath. BenxHarem Max,Gwen,Azmuth,and Tetrax are Demigods

Ben is talking. I'm eating lunch at school, then these things attack us, and I get whisked away to a 'magical' camp, called Camp half blood. Now the author is talking. i suck at summarys, but the story is good! Please R&R.

When Percy and Ben meet, or meet again, will their combined powers, along with Gwen, Kevin, Nico, Thalia, and Annabeth save the world from the return of Vilgax?

What happens when Percy Jackson finds the Omnitrix? Mass Chaos when Vilgax tries to get his hands on it. What will happen when this Halfblood gets the power of many aliens? Many strange things. R&R

Across the many world realms of the universe, a rich scientist omnitrix wielder, named Tonto has accidently freed Kronos after 21 years of him being gone. Now, he must figure out what he has done before Kronos attacks. Tonto belongs to Omnitrix1,