Halo and Slender
Crossovers
Halo, Welcome to New York, Part 1: First Landing by SPARTAN-117-2 reviews
When Cortana awakens the slumbering Master Chief to alert him of a wormhole, a whole new war begins. Includes themes and characters from Harry Potter, Halo, Marvel, and some others.
Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 19,354 - Reviews: 6 - Favs: 25 - Follows: 27 - Updated: 8/24 - Published: 9/2/2022 - Master Chief/John-117, Slender
Halo Welcome to New York, Part 2: Tales of Slender by SPARTAN-117-2
Slenderman was trapped in SCP-3008 for months. He was beaten by John-117. Now he's out for blood... Spartan blood.
Rated: T - English - Horror/Sci-Fi - Chapters: 1 - Words: 96 - Favs: 2 - Follows: 2 - Published: 3/9 - Master Chief/John-117, Slender
Gathering Darkness by Obsidian Thirteen reviews
When a battle-hardened squad of ODSTs drops into the forests of Darkholm, a distant and isolated world, one rainy night under false pretenses, they find themselves facing down a seemingly impossible entity, far deadlier than any they have ever before encountered...
Rated: T - English - Horror/Mystery - Chapters: 20 - Words: 54,091 - Reviews: 22 - Favs: 36 - Follows: 29 - Updated: 6/11/2017 - Published: 1/31/2017 - Complete