Mods / UndergroundHalf-Life: Alyx mods
Half-Life: Alyx underground mods
Everything filed under underground by its own author, ordered by how much it is used.
AllAlyx Addon1.7kShort (less than 20m)524Maps519Models287Valve Games269Combine Soldiers267Action256Infinite / Looped241Textures213Ported Content204No Combat203Urban199Zombies193Headcrabs193Beginner192Hardcore176HL:A Campaign-like172Game Modifications & Replacements170Recreations & Remakes169Other Environment148Industrial143Asset Packs142Showcase & Scenic142Sounds134Sci-Fi129Adventure128Underground128Horror122NPCs119Miscellaneous Content114Weapons110puzzle107Developer Resources106Combine Structures105Custom Mechanics97Other Genre94Sandbox86Other Addon Type83Xenfestation82Other Enemies80Other Theme80Comedy75Scripts & AI73Nature71Antlions71Long (an hour)70Friendly Companions70Abstract66Exotic60Prefabs47Particles47Rural44Campaign (2 hours or more)43Pop Culture43Jeff43Platforming & Climb39Defense & Arenas39Fantasy38Quality Of Life36Stealth34Arcade & Minigames33Crime32Musical27Educational27Water23Open-World22Training21Vehicle12Historical11RPG10Snow10
128 underground mods
- Half Life: Interloper - Map 1 "Black Mesa" (Project on Hiatus)by DeegsWork in progress 3883 01010011 01101111 01110010 01110010 01111001 00100000 01100110 01101111 01110010 00100000 01110100 01101000 01100101 00100000 01110011 01100011 01100001 01110010 01100101 00101110 00001010 00001010 01010011 01101111 01110010 01110010 01111001 00100000 01100110 01101111 01110...3.9k downloadsupdated 18 mo ago
- Fast Headcrab Restoredby Resonλnce "Almost immediately we cut the fast headcrab and the fast zombie from Half-Life 2. The shock of having that guy come around the corner and latch onto you before you'd even know what was going on...3.6k downloadsupdated 2 y ago
- Half-Life: Alyxby CementStairsHalf-Life: Alyx is a return to the Half-Life series. It’s not a story of an impossible fight against a vicious alien race known as the Combine, set between the events of Half-Life and Half-Life 2. Playing as Yourself, you are the being's only chance for survival. The Human control of the planet s...3.4k downloadsupdated 5 y ago
- Half-Life: Alyx - E1M1 Reduxby TheReenoOn July 9th, 2020 Half-Life: Alyx - Final Hours was released and with it came a video that showed an early prototype of a map dubbed E1M1, this map was mainly a test that showed off what a VR Half-Life game would feel/look like. On that day I began working on this remake remaster redux. It starte...3.4k downloadsupdated 5 y ago
- Biohackingby 76561199105877270Small update (see the changelog) Still it's not a DEFINITIVE VERSION. I am sorry but the final update is taking longer than expected Alyx Biohacking is a 4 hour sequel to the original campaign that combines ultra-realistic with surrealism. This mod contains many custom mechanics. Most notably, It...3.1k downloadsupdated 17 mo ago
- Xombiesby NeonYou need to leave your safe hideout and fight your way trough the Zombie infested parts of Quarantine Zone. It's my first map with any gameplay value. Any feedback would be greatly appreciated!3.1k downloadsupdated 6 y ago
- Savage Sewersby PrivateHorseLegsAs you make your way to the Vault, you, Alyx Vance, decide to take a detour by going en route via the sewers. Hi, everyone. Just to let you all know that this is my first time making a map for HL:A, which took around 3 weeks to make! Because of that, don't expect it to be completely perfect as yo...3.1k downloadsupdated 6 y ago
- NOVA PROSPEKT REMAKEby CatBaitPreface (optional to read) It's been so long since I last published my work in the workshop, and it wasn't without reason... In fact, I've done Nova Prospekt twice. Because the first time I lost the map files (and in general the source files of all my addons). Thank God I still have the old sourc...2.9k downloadsupdated 13 mo ago
- [Portal2] sp_a3_01by 76561198882852673A port of sp_a3_01 from Portal 2. This is the map after falling in "The Fall." Also see: The Courtesy Call It's not a direct port, as I took some creative liberties while porting it. For one, all the lighting is different and there's practically no fog. This was a result of me learning how Hammer...2.9k downloadsupdated 5 y ago
- Half-Life 2: Remake demo (d1_canals_01_a)by CatBaitThis is my next recreation of the Half-Life: 2 map on Source 2 in VR. I spent a lot of time and effort on this, enjoy! Instructions Subscride to the ALL addons Enable it in the game Select a map (d1_canals_01_a) Enjoy =) Notes Weapons replaced with weapons from Half-Life 2 Most of the voicelines...2.8k downloadsupdated 2 y ago
- First Sectorby VokbertsHello! This is my fisrt map. Alyx is trying to survive and escape from the dangerous "First" sector. The duration of the game is 1-2 hours. I created a classic Half-Life Alyx style gameplay with original music and some horror moments. I recommend you playing on normal or high difficult. I hope yo...2.6k downloadsupdated 21 mo ago
- Combine Aftermathby 76561198344122478my epic website: Story: You got notified that the combine found a reason to come to your area due to the Zombie Infestation. They set up a few ambushes to catch every civilian trying to leave the area. You wake up from the screams of a Zombie that has entered your apartment, so you grab your gun...2.4k downloadsupdated 4 y ago
- Tau Ceti 17by 76561199111603847This is the first update to Tau Ceti 17. It's an outer space based non-combat VR experience that takes place in various locations on and around the fictional planet Tau Ceti 17. There are some simple challenges and puzzles, as well as opportunities to interact with objects and the environment. If...1.9k downloadsupdated 10 mo ago
- Escape the Apartmentby 76561198344122478my epic website: This is my first ever map in hammer. I have experimented with hammer a bit already but I had really started learning it 4 days ago. This map is about 15 min. long and features 3 major combine fights, a couple of fights with zombies, and 48 resin to collect. I'm really thankful fo...1.9k downloadsupdated 4 y ago
- Combine Interventionby ProbablyOKA short map with the intention of delivering the most fun components of HL: Alyx with the addition of other interesting concepts. BY THE WAY! Perhaps don't immediately throw away the red and yellow keycards, you might need them! Prefab used:1.9k downloadsupdated 6 y ago
- Quake - E1M1by Mettle MeekA port of the map E1M1 from Quake, now including most of the secret areas.1.9k downloadsupdated 4 y ago
- Backtrackby ProbablyOKVersion 1.2 Backtrack is a map that, you guessed it, involves backtracking to previous locations. The map focuses around a distinctive central area, with three unique locations branching from this point. As the map progresses, you will become acquainted with weapons familiar to the vanilla Alyx e...1.8k downloadsupdated 6 y ago
- My Final Mapby 76561198836606621Finally, after 8 Months of work, it is done. To those who have already played my previous 2 Maps, this might seem familiar, reasion being that its just a combination of both with a few tweaks, fixes and additions here and there. I really hope you enjoy it :) Special thanks to Siegfried and Günthe...1.8k downloadsupdated 23 mo ago
- Poly Haven Megapack [S2FM]by Harry101UKA pack of almost every free Poly Haven model currently available, ported for Source 2 Filmmaker! This contains 120+ highly detailed models, from chairs, payphones, tables, clocks, fruits, to plants and even a ship! Every model has high quality 4K PBR (some 8K) materials, and I added custom Ambien...1.6k downloadsupdated 4 y ago
- The Matrix Impossible: Part 3by Architect1.5k downloadsupdated 8 mo ago
- Absolutionby NeonPreviously titled "Short & Shitty: Absolution." Sorry for any inconvenience, but I decided to change the title. Modified version of Short & Shitty This version of Short & Shitty map gets rid of the custom assets and replacements related to S&box and Terry. Absolution is here Absolution is a short...1.5k downloadsupdated 3 y ago
- Rebel 4 (Development On Hold)by gokutofuVersion 3 is out, you can see the changes in the change log! The 4th installment of the Rebel series. This demo is a small portion of the mod that I would like to get community feedback on! Anything and EVERYTHING can or will change before final release... Contains about 25% of planned content Re...1.5k downloadsupdated 20 mo ago
- Facility 14 - DEMOby kheperaThis a Part 1 of an upcoming custom HL:A Campaign! Remember this is just a DEMO and therefore is short! You are apart of the secret undercover rebel group "Alpha 1" undertaking a raid in the now abandoned Facility 14. Hours into the raid you are now the last man standing. Survive the many deadly...1.5k downloadsupdated 3 y ago
- The Nestby CuserMain objective -Make the nest collapse by destroying the 3 columns and return to the truck Secondary Objective -Locate and terminate the man with the suitcase Map Story After your success retrieving EBE063 and surviving the antlion arena 1 and 2 events you have been promoted to team leader. This...1.5k downloadsupdated 5 y ago
- The Matrix Impossible: Part 2by Architect1.5k downloadsupdated 8 mo ago
- The Matrix Impossible: Part 1by ArchitectThis mod is still in development... Get ready to push the Source 2 Engine to its Limits... WELCOME, TO THE MATRIX IMPOSSIBLE! This mod is still going through changes/upgrades. Feel free to enjoy everything up to the Elevator Ride of the Lobby Shootout. Past that, there are a few bugs I'm working...1.5k downloadsupdated 7 mo ago
- Subsurface tension Chapter 1: Combatantby Nexu_ssAlyx has gained information of a new combine base, the base is located under city 17 in a old underground storage facility. Her mission is to infiltrate, and destroy the new base before they can fortify it, Good luck. Note: This Map may be un balanced. Also this is my first published map and stil...1.4k downloadsupdated 4 y ago
- Eternity #JunebugBluesby kheperaAs part of my entry to the #JunebugBlues map jam, this map features a very short story about "eternal hell" and horror. Please leave thoughts as I may consider making a more fleshed out map in the future with a deeper story depending on the consensus of this concept. Special thanks to the Source...1.3k downloadsupdated 2 y ago
- HDRI Map Megapack [S2FM]by Harry101UKIMPORTANT This didn't fit on the Workshop, so you'll need to download the files here: (12gb) A large pack of empty void maps with HDRI light probes that you can load into SFM to get an ambient lighting setup. These help to tone shadows and add reflections to glossy materials. These are great for...1.3k downloadsupdated 4 y ago
- Back Alley Remakeby mrcharheadThis is a remake of my first ever Half-Life Alyx map, Back Alley, made for the Combine Presence Mapping Contest back in May of 2020. Areas have been added and redone to make the layout more interesting and make more sense in the world. The Original Back Alley can be found here:1.3k downloadsupdated 4 y ago
- Salvationby Papa SidSubject: Alyx Vance, Age 19, Female Affiliation: Human Resistance Current Assignment: Search and Rescue You are tasked with locating the origin of a distress signal. It appears to be coming from the abandonded housing developments in the outskirts of Ravenholm. You must locate the signal and any...1.3k downloadsupdated 4 y ago
- Half-Life: Alyx 2026 Map Jamby RitsukaA collaboration of 7 humans to create a continuous Half-Life: Alyx campaign spanning several wacky maps LENGTH: ~2 hours DIFFICULTY: Hard Map Creator Cookie quest Ritsuka That's oddly familiar Glados2.0 Full Cream Mode Korny bad_house SavageJoe An Encounter NoBoi The Heist λrokh Enclosed Glados2....1.2k downloadsupdated 5 mo ago
- Aliveby CementStairsMake sure you physically lay down to the ground and stay that way throughout the whole map. A short slightly horror map for the MapLabs Competition Huge thanks to Chris for making the thumbnails #MapLabsWS1 If you liked the map please consider rating/adding it to favourites, it helps a lot - Than...1.2k downloadsupdated 6 y ago
- Museum of Source 2by CementStairsWelcome to the Museum of Source 2! Are you a player who always wondered how maps are being made? Are you a developer who craves for new knowledge to apply in your mod? Or are you just a person who can't visit a real museum instead? Then what are you waiting for?! Hop on and see our exposition, fu...1.2k downloadsupdated 4 y ago
- Bivouacby FrostEpex"An hour's walk to the nearest town to mail a letter, can you believe it? Don't worry, that won't stop you hearing from me. I've set up camp already and the pine smells delish! Now I get a chance to explore so I can give you a guided tour~ You'll get 3 more letters from me before you head out. On...1.1k downloadsupdated 4 y ago
- Combine Un-Safetyby λrokhWelcome to my first map. To support the Resistance Alyx Vance has to shutdown a Combine station and finally fight her way out of the industrial complex. This combat focused map features - about 25 Minutes of playtime - Combine fight sequences - Zombies, Headcrabs - Reviver - Climbing - Autosaves...954 downloadsupdated 5 y ago
- An Array of Roomsby ProbablyOKMade in 3 days. Much more pleased with this map compared to previous mapping expiriences. Finally feel aquainted with Source 2 Hammer :) Prefabs used:873 downloadsupdated 6 y ago
- Headcrab Diner (Old Experiments)by FrostEpexA collection of three very early test maps made when Half-Life: Alyx first released to experiment with all the different features. The three maps have been stitched together to allow playthrough in a single map, while also compiled separately for easier choice. These maps were very early experime...840 downloadsupdated 3 y ago
- Exuviae #dejavuby Mettle MeekAlyx Vance is on a mission to rescue her friend Olga from a Combine safehouse. But things might take an unexpected turn... This map is my submission for the Vaultmaps Deja Vu mapping competition.807 downloadsupdated 4 y ago
- Operation: Overlordby gokutofuABOUT Remastered version of the older Operation: Overlord map. This one aims for more historical accuracy and a more live environment. Yes that means swastikas are in the map. Sprint mod is recommended but not required. FEATURES Contains a working Tank, friendly Combine, destruction and a open en...793 downloadsupdated 3 y ago
- Astroxenophobiaby 76561199151758923The elevator to Fairview Junction has crashed...You're now deep , so deep that no one was supposed to be here in the first place. Music used : Black Betty by Ram Jam What Kind of Hospital Is This by Kelly Bailey618 downloadsupdated 4 mo ago
- This Vortal Coilby λrokhEquipped with her reliable 45er, Alyx has to fight waves of Antlions until the rescue elevator arrives. The elevator is secured with Manhacks. Made this map a while ago and it should have been part of a larger addon. I binned that idea due to story changes and this map was going to be deleted. Ye...589 downloadsupdated 2 y ago
- Do it for Her #spooktober22by Drakon2689Your wife has fallen deathly ill. Her only hope? Antibiotics. The only place not looted within a 50 mile radius is a so-called “Cursed” subway station. Many have gone in. None have come out. They are endless. Fear them. Do not be afraid to run. Do it for Her. Do it for Her is a short but terrifyi...501 downloadsupdated 4 y ago
- Marksmanby NeonYou make the shots. Marksman is an arcade style map where the player takes on a role of a Combine support sniping unit. The goal in Marksman is to protect the team of Grunts from upcoming endless waves of enemy hostiles. Marksman uses the Vscript and Panorama systems of Source 2 to give you a bra...485 downloadsupdated 8 mo ago
- Shooting Galleryby scallywagA HLA sandbox level that takes place in a hidden garage that the resistance has established as a training ground with many different toys to play with, mostly catering towards practicing your art of killing. This map offers a variety of tools, such as: -Every upgrade is available and buyable with...473 downloadsupdated 3 y ago
- Breach Zeroby Quantum_StormYou wake up in an abandoned location underground. Not knowing how long or why you are there but regardless you press on to reach the surface not knowing what you will come across.449 downloadsupdated 4 y ago
- Tomas2886cz Adventuresby 76561198341096084Tomáši!!! it's time to rise and shine... You spent 10 years in your basement... You played games with your friends, half life alyx, but the strange thing is that even after half life alyx, half life 3 is nowhere. But you just don't realize that valve is always one step ahead. half life 1, 2 and A...435 downloadsupdated 4 y ago
- Rust Rain DEMOby TachyonicThis is a demo version of my combat campaign. The first two scenes with battles against the Combine are presented... The mod has its own soundtrack, written by me in FL Studio. WIP "Somewhere in the forest, Alyx Vance is resting when she suddenly receives a message that the Combine is preparing s...433 downloadsupdated 3 mo ago