Half-Life Crossovers
Filters
278 | Page 1 2 3 4 11 .. Last Next »

Run Think Shoot Live by a Xen traveler
After being held in stasis by the G-man Alyx finds herself on a multiverse adventure. Waking up on a new planet in a new body she must work with the local resistance and make up for Dr. Robotnik's betrayal. Half-Life multiverse and old Sonic SatAM cartoon mixed with others but like 12 years later. Creative liberties taken. No sexual content. Blood and guts can happen. M for safety.
Crossover - Sonic the Hedgehog & Half-Life - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 13,678 - Favs: 1 - Follows: 1 - Updated: 23h - Published: 4/26 - Tails, Sally, Alyx V.
Proto-Life by ThePaleDarkness
Nina, a prototype, ends up in the quarantine zone of city-17, just as Alyx arrives there as well. Takes place during Half-Life: Alyx. OC WARNING!
Crossover - Half-Life & Prototype - Rated: M - English - Mystery/Adventure - Chapters: 1 - Words: 1,556 - Follows: 1 - Published: 4/23
Half Life: Entanglement by ThePilotArchangel reviews
Ayita Shephard, Lambda Resistance; Cato'Zorah nar Rayya, hired Quarian of the Council Funded Relay 314 Expedition. Both dissatisfied with their lot in this universe; one under the heel of a Inter-Universal Empire, and the other under the boot of an Apathetic Galactic Council. Together they will change the Galaxy. (Image not Owned, Co-Written with IantheMechanic, First Contact AU)
Crossover - Half-Life & Mass Effect - Rated: T - English - Sci-Fi/Family - Chapters: 34 - Words: 285,971 - Reviews: 28 - Favs: 80 - Follows: 114 - Updated: 4/2 - Published: 6/30/2020 - [Shepard, OC] Garrus V., Tali'Zorah
The Wrong Man in the Right Place by Two-Eyed Charlie reviews
Gordon arrives at City 17, but something is very much off... [COMPLETE]
Crossover - Half-Life & Portal - Rated: T - English - Humor - Chapters: 1 - Words: 1,182 - Reviews: 1 - Follows: 1 - Published: 4/2 - G-Man, Gordon F., Cave Johnson - Complete
Virtual Reality by JudoJitsu
Case #9992341 - Statement of Wayne Dalton, regarding his experience playing an experimental VR version of the game Half-Life. (a hlvrai/tma crossover. crossposted on ao3)
Crossover - Half-Life & Radio Dramas - Rated: T - English - Suspense/Horror - Chapters: 1 - Words: 1,927 - Published: 3/27 - Gordon F., The Magnus Archives - Complete
Freeman's odyssey by megacoldfusion reviews
After the events of Half-life episode 2, Gordon is left to wonder what to do next and Doctor Kliner has the answer for him. It will take him to strange new dimensions in meeting interesting people to warn of the Combine threat, the real question remains is he already too late?
Crossover - X-overs & Half-Life - Rated: M - English - Adventure/Sci-Fi - Chapters: 204 - Words: 323,202 - Reviews: 34 - Favs: 66 - Follows: 60 - Updated: 2/21 - Published: 5/5/2013 - Gordon F.
My Hero Academia Plays Half-Life by Kevmin reviews
The characters are sent to an unknown theater to play Half-Life. Rated M for gore, swearing, and a testicle spider infestation
Crossover - My Hero Academia/僕のヒーローアカデミア & Half-Life - Rated: M - English - Sci-Fi/Humor - Chapters: 2 - Words: 1,297 - Reviews: 4 - Favs: 11 - Follows: 18 - Updated: 2/4 - Published: 1/27 - 1-A Students, 1-B Students, Gordon F.
A Business Deal for a Friend by Prof. Pancakes reviews
Deals are made for the one known as Gordon Freeman, yet the one who accepts such deals is none other than the mysterious man himself. When the time comes to accept a job from a dear "Business Partner", there is none other than the one Freeman to do it.
Crossover - Half-Life & RWBY - Rated: T - English - Humor/Fantasy - Chapters: 17 - Words: 101,416 - Reviews: 98 - Favs: 154 - Follows: 194 - Updated: 1/29 - Published: 11/19/2017 - G-Man, Gordon F., Team RWBY, Team JNPR
To Right The Wrongs Redux by DerpymanMT reviews
Gordon Wasnt meant to be Transported to another Universe. Gman's Employers wont be happy... Gordon x Ritsuko, This is the New Redux! Rated M for possible Lemon.
Crossover - Evangelion & Half-Life - Rated: M - English - Romance/Sci-Fi - Chapters: 1 - Words: 2,087 - Reviews: 1 - Favs: 1 - Follows: 3 - Published: 1/19 - Ritsuko A., Gordon F., Shinji I., Asuka L. S.
Second Life Choices by PortalsandArt reviews
Something in life guides everyone. Sometimes it's people, sometimes it's the choices that are made. Chell is on the surface and finds the world is a much different place than the depths of Aperture. Gordon and Alyx are trying to fulfill Eli's dying last wish but that's easier said than done. While at White Forest Barney Calhoun just tries to keep everything from falling apart.
Crossover - Half-Life & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 44 - Words: 141,131 - Reviews: 27 - Favs: 40 - Follows: 58 - Updated: 1/9 - Published: 7/9/2020 - Alyx V., Barney C., Gordon F., Chell
Multiversal Discussions by hunter 139 reviews
Doctor Strange ends up in an unfamiliar place with powerful cosmic beings. He soon learns that the nature of the multiverse is far greater than anyone can imagine.
Crossover - Half-Life & Avengers - Rated: T - English - Spiritual/Supernatural - Chapters: 2 - Words: 7,205 - Reviews: 9 - Favs: 14 - Follows: 11 - Updated: 1/1 - Published: 10/2/2021 - G-Man, Dr. Strange/Stephen S.
Strange New World by LittleInkling64 reviews
Of Ratts and Men sequel. City 17 may be destroyed, but the Combine still reign supreme over Earth. Now, the Half-Life gang must find the Borealis so they can use its portal technology to find Alyx and finally beat the Combine. Luckily, three of the best candidates for the task have just rejoined the surface. Not so luckily, the Combine has found them first. See Ao3 for ch. updates!
Crossover - Half-Life & Portal - Rated: T - English - Adventure/Sci-Fi - Chapters: 8 - Words: 44,620 - Reviews: 2 - Favs: 4 - Follows: 5 - Updated: 12/6/2021 - Published: 2/26/2021 - Eli V., Gordon F., Caroline, Chell
A Mutual Friend visits a City by Solarmech reviews
A strange visitor visits the city of Columbia looking for new "employees".
Crossover - Half-Life & BioShock - Rated: K+ - English - Drama/Sci-Fi - Chapters: 1 - Words: 1,871 - Reviews: 1 - Favs: 9 - Follows: 5 - Published: 10/15/2021 - G-Man, Robert L., Rosalind L. - Complete
The True Free Man by The Alamore reviews
When Gordon Freeman accepted the G-Man's deal, he had never expected his next assignment to be placed in another world where humans were hunted down and eaten by giants while backstabbers and undermines plague what remains of humanity. All of it tendering on a world on the verge of collapse and ruin, but the right man in the wrong place can make all the difference in the world.
Crossover - Half-Life & Attack on Titan/進撃の巨人 - Rated: M - English - Adventure/Sci-Fi - Chapters: 1 - Words: 15,970 - Reviews: 10 - Favs: 45 - Follows: 57 - Published: 10/8/2021 - G-Man, Gordon F., Eren Y., Hannes
Hello G- Louise by Ultradragonfan reviews
Benrey goes on vacation while Dr Coomer deals with an angry wizard girl and a school full of entitled jerks. then a man in purple shows up, along with a mystery artist who knows the full history of Dr coomer and his team. Lousie starts questioning Dr Coomer, but Dr Coomer doesn't give a single care in the world. Just what did this man have to do with her?
Crossover - Half-Life & Familiar of Zero - Rated: K+ - English - Humor/Mystery - Chapters: 2 - Words: 5,017 - Reviews: 32 - Favs: 16 - Follows: 25 - Updated: 9/27/2021 - Published: 6/3/2021 - Louise
Half-Life: 4546B by MoravianCrusader
Following the Black Mesa incident, Gordon Freeman successfully stops the Cascade using the satellite delivery rocket. Years later, Black Mesa is in the middle of an operation where they send agents to other worlds by using purposefully constructed Cascades. One such planet is 4546B, a planet on which they have almost no info. Unexpectedly, humanity finds itself determining fate.
Crossover - Half-Life & SubNautica - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 3,504 - Favs: 2 - Follows: 2 - Updated: 8/30/2021 - Published: 8/25/2021 - Eli V., Gordon F., I. Kleiner, OC
Zootopia 17 by lopezz reviews
Un fallo imprevisto en el teletransportador de White Forest, envía a Gordon Freeman al universo de Zootopia donde deberá arreglárselas para intentar escapar de la ciudad, sin embargo no lo tendrá nada fácil.
Crossover - Half-Life & Zootopia - Rated: T - Spanish - Adventure - Chapters: 48 - Words: 172,379 - Reviews: 18 - Favs: 10 - Follows: 14 - Updated: 8/6/2021 - Published: 2/26/2020
Freeman's Blessings by Charles From IRS reviews
Free from G-Man's grasp and his name forgotten in time, Gordon sets out in The Borealis expecting death. Instead, he is sent to purgatory and made an offer, save another world and get a reward for it, basically. He can do it, after all, he is The Freeman. WARNING, Dumpster fire of a fanfiction and T for blood, violence and swearing.
Crossover - KonoSuba: God's Blessing on This Wonderful World & Half-Life - Rated: T - English - Adventure/Fantasy - Chapters: 3 - Words: 1,763 - Reviews: 9 - Favs: 16 - Follows: 31 - Updated: 5/2/2021 - Published: 9/22/2019 - Aqua, Kazuma S., Megumin, Gordon F.
Twenty Years Late by A Very Thirsty Megalomaniac reviews
It's hard for the Ethereals to invade when someone else got there first.
Crossover - X-Com & Half-Life - Rated: T - English - Sci-Fi/Adventure - Chapters: 26 - Words: 132,147 - Reviews: 65 - Favs: 158 - Follows: 182 - Updated: 4/16/2021 - Published: 5/14/2018 - Bradford, A. Shephard, Barney C., The Combine
Half Life In Another World by AntmanGoesUpThanosThanus reviews
(half-life x re:zero crossover) My take on Re:Zero, but Subaru along with Gordon Freeman are summoned to the parallel world, each through different means. Freeman and Subaru form an alliance to survive in this new world, adventure awaits this pair!
Crossover - Re:Zero & Half-Life - Rated: M - English - Adventure/Fantasy - Chapters: 2 - Words: 5,376 - Reviews: 16 - Favs: 29 - Follows: 47 - Updated: 3/24/2021 - Published: 6/9/2020 - Subaru N., Emilia, Pack, Felt
Salvation: Lair of the Shadow Broker by Jesse De La Rosa reviews
Salvation: Episode II - The Lair of the Shadow Broker - A slight re-imagining of the action packed Mass Effect 2 DLC. After defeating the Reaper threat and surviving the hijacking of the Carmenta Illustria, a dire message from one of Shepard's oldest and dearest friends plunges the team into a treacherous search for the mysterious Shadow Broker. But there are other forces at work..
Crossover - Half-Life & Mass Effect - Rated: T - English - Chapters: 8 - Words: 52,020 - Reviews: 36 - Favs: 32 - Follows: 36 - Updated: 3/16/2021 - Published: 3/8/2017
PortalHalf-Life: See You Soon by iammemyself reviews
The human race is a lost cause as far as GLaDOS is concerned, but there just might be one person worth her time.
Crossover - Half-Life & Portal - Rated: K+ - English - Romance/Friendship - Chapters: 3 - Words: 16,011 - Reviews: 5 - Favs: 3 - Follows: 6 - Published: 1/23/2021 - [Alyx V., GLaDOS] - Complete
To Right The Wrongs by DerpymanMT reviews
(Set at the end of Half-Life 2) Gordon wasn't meant to be caught in the portal's blast. G-Man Hadn't planned for when he failed to catch him. Now Gordon is in a world not plagued by the combine, but by loneliness and pain. Will He set the Pilots and the rest of the world on a better path, lead by the Freeman? Redux Being Made, Please Check To Right The Wrongs Redux
Crossover - Evangelion & Half-Life - Rated: T - English - Family/Romance - Chapters: 9 - Words: 19,250 - Reviews: 2 - Favs: 19 - Follows: 23 - Updated: 12/28/2020 - Published: 11/22/2020 - [Ritsuko A., Gordon F.]
Girls, Tanks, and Resonance Cascades by AAHW reviews
The Combine are the lords of Earth. It has been nearly twenty years after their victory in the Seven Hour's War and those that survive live to suffer under their oppression. In a world utterly transformed for the worse, Miho Nishizumi along with her big sister just do what they can to get by. Yet for the younger Nishizumi, she will not tolerate the status quo.
Crossover - Half-Life & Girls und Panzer/ガールズ&パンツァー - Rated: T - English - Sci-Fi - Chapters: 4 - Words: 18,069 - Reviews: 10 - Favs: 13 - Follows: 17 - Updated: 12/12/2020 - Published: 5/13/2020 - Erika I., Maho N., Miho N., Yukari A.
Libera Terra by Johnnieboy11 reviews
When Earth fell in the grip of the Universal Union, mankind had lost hope. Few dared oppose the alien army that won the 7 Hour War and since their crushing victory, Our Benefactors have lived relatively unopposed... Until now.
Crossover - Half-Life & Halo - Rated: M - English - Sci-Fi/Horror - Chapters: 4 - Words: 14,043 - Reviews: 30 - Favs: 65 - Follows: 101 - Updated: 12/7/2020 - Published: 4/8/2020
278 | Page 1 2 3 4 11 .. Last Next »