Assassin's Creed and Adventure Time with Finn and Jake Crossovers
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Ooo and the Animus by MrJaffaJack reviews
On the surface, Ooo seemed to be enjoying its longest bout of peacetime yet, due to the exploits of Finn and Jake. But just below the surface, a conspiracy that had been brewing for thousands of years was threatening to change everything Finn had ever known and believed in - for better or worse.
Rated: T - English - Adventure/Romance - Chapters: 3 - Words: 3,877 - Reviews: 4 - Favs: 5 - Follows: 4 - Updated: 11/26/2014 - Published: 11/1/2014 - Desmond M., Finn, Jake, Marceline A.
Finn the Red (preview) by Atomsk the Pirate King reviews
I don't know what you will think of this but it's not going be exactly like black flag. There are no guns only; cannons, magic, swords, ax, etc.
Rated: K+ - English - Chapters: 1 - Words: 238 - Reviews: 4 - Favs: 2 - Follows: 1 - Published: 4/22/2014 - Complete
The Young Hero, the Animus, and the Assassin by panjerry reviews
Finn, Jake, Princess Bubblegum, and Marceline discover the Abstergo facility on an isolated land miles and miles away from mainland Ooo. There, Finn discovers the power of the Animus as he learns the way of his Assassin ancestors, and learning secrets.
Rated: T - English - Adventure - Chapters: 6 - Words: 6,669 - Reviews: 43 - Favs: 28 - Follows: 37 - Updated: 3/28/2012 - Published: 10/23/2011 - Altaïr, Finn