Sonic the Hedgehog and Half-Life Crossovers
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The Story Of Dark by Idling ISL reviews
Dark is a known name around the Combine directing their planetary invasions, and yet he isn't a transanthro. How did he get there? How did he join, and why? Here you'll find out.
Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 11,608 - Reviews: 3 - Favs: 4 - Follows: 3 - Updated: 9/14 - Published: 5/2 - OC
Half-Life: Oppressive Forces by LegoKid343 reviews
After facing nearly impossible odds in Black Mesa, Corporal Shepherd must now fight alongside The Sons of Heephis not only to save Mobius, but the entire universe from destruction at the hands of a powerful being known as Zeilo. However, he can't do it alone.
Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 1,428 - Reviews: 1 - Favs: 2 - Follows: 2 - Published: 4/12/2016 - Sonic, A. Shephard, OC
Duty or Death by LegoKid343 reviews
Adrian Shepherd. The HECU Marine who survived all odds in Black Mesa is now given an assignment from the Gman. The mission? Kill Robotnik. (Inspired by SheathEntertainment's SFM Saxxy Entry: Reinstated)
Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 677 - Reviews: 1 - Follows: 1 - Updated: 4/10/2016 - Published: 1/26/2016 - Sonic, A. Shephard
Mobius Opposing Forces(REMAKE IN PROGRESS) by LegoKid343
Gman gives everyone's favorite HECU Marine a new assignment. And where else if not Mobius. Shephard now has to help Sonic and his friends fight Robotnik, until a new enemy arrives to conquer the whole planet... R&R, Enjoy! (Shephard will be using standard USMC weapons, just so you know.)
Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 977 - Favs: 1 - Follows: 2 - Updated: 4/10/2016 - Published: 11/27/2014
Guard Duty by LegoKid343 reviews
After trying to get out of City 17 before the Citadel went critical, Barney Calhoun finds himself stranded on a new world with no way of returning to Earth.
Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 859 - Reviews: 1 - Favs: 2 - Follows: 2 - Updated: 4/10/2016 - Published: 3/29/2016 - Sonic, Barney C.
Chaos Cascade by MisterCereal reviews
Gordon Freeman, an average scientist working at the Black Mesa Research Facility, is in charge of handling the newest test subject; and odd green crystal-like object.
Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 487 - Reviews: 1 - Favs: 2 - Follows: 2 - Published: 4/27/2014
HalfLife: Source Code by thermonuclear.cupcake reviews
Some thing at Black Mesa has gone terribly wrong, and there's only two people who can clean it up.
Rated: T - English - Suspense/Adventure - Chapters: 2 - Words: 852 - Reviews: 5 - Favs: 4 - Follows: 2 - Updated: 1/4/2012 - Published: 12/28/2011 - Sonic
The Adventures of the One Free Hedgehog by I Really Hate Captchas reviews
ur all still gay
Rated: T - English - Adventure/Friendship - Chapters: 1 - Words: 989 - Reviews: 10 - Favs: 1 - Follows: 1 - Published: 6/23/2010 - Complete
The combines reckoning by Tlaloc Amnell reviews
The Combines Reckoning is a small story with my character Tlaloc and a few others who get sent back in time to City 17.
Rated: T - English - Sci-Fi/Mystery - Chapters: 1 - Words: 3,415 - Reviews: 1 - Follows: 1 - Published: 1/11/2010