List of FREE Source Engine Mods on Steam

A list of all Source engine, Goldsrc Engine, and any Valve-associated mods that are FREE on Steam. YOU WILL REQUIRE THE BASE GAMES TO PLAY THESE MODS 99% OF THE TIME.

I don't know why all the store page links won't embed.

Half-Life Mods

https://store.steampowered.com/app/679990/HalfLife_Caged/
https://store.steampowered.com/app/644320/Halfquake_Trilogy/
https://store.steampowered.com/app/632730/Base_Defense/
https://store.steampowered.com/app/354900/Headcrab_Frenzy/
https://store.steampowered.com/app/1283930/HalfLife_Restored/
https://store.steampowered.com/app/638360/HalfRats_Parasomnia/
https://store.steampowered.com/app/261980/HalfLife_Before/
https://store.steampowered.com/app/850870/HardLife/
https://store.steampowered.com/app/1908720/HalfLife_VR_Mod
https://store.steampowered.com/app/223710/Cry_of_Fear/
https://store.steampowered.com/app/1761270/HalfLife_MMod/
https://store.steampowered.com/app/1874090/HalfLife_Decay_Solo_Mission/
https://store.steampowered.com/app/1066610/Digital_Paintball_Redux/
https://store.steampowered.com/app/812440/HalfLife_Absolute_Zero/

Half-Life 2 (Source Engine) Mods

https://store.steampowered.com/app/2158860/JBMod/
https://store.steampowered.com/app/628410/Arctic_Adventure_Episodes/
https://store.steampowered.com/app/17550/Eternal_Silence/
https://store.steampowered.com/app/353220/Fast_Detect/
https://store.steampowered.com/app/1154130/Logistique_Act_1/
https://store.steampowered.com/app/313240/Wilson_Chronicles/
https://store.steampowered.com/app/349480/Modular_Combat/
https://store.steampowered.com/app/638800/The_Trap_2_Mindlock_beta/
https://store.steampowered.com/app/1054600/Resistance_Element/
https://store.steampowered.com/app/253530/Fortress_Forever/
https://store.steampowered.com/app/1815330/Swelter/
https://store.steampowered.com/app/17730/Smashball/
https://store.steampowered.com/app/17750/Obsidian_Conflict/
https://store.steampowered.com/app/1372780/Quantum_Paradox/
https://store.steampowered.com/app/90007/International_Online_Soccer/
https://store.steampowered.com/app/90044/Zombie_Panic/
https://store.steampowered.com/app/17530/DIPRIP_Warm_Up/
https://store.steampowered.com/app/17550/Eternal_Silence/
https://store.steampowered.com/app/1341060/HalfLife_2_Genrys_Great_Escape_From_City_13/
https://store.steampowered.com/app/1066610/Digital_Paintball_Redux/
https://store.steampowered.com/app/244630/NEOTOKYO/
https://store.steampowered.com/app/334370/From_Earth/
https://store.steampowered.com/app/17700/INSURGENCY_Modern_Infantry_Combat/
https://store.steampowered.com/app/235780/MINERVA/
https://store.steampowered.com/app/17510/Age_of_Chivalry/
https://store.steampowered.com/app/714070/Entropy__Zero/
https://store.steampowered.com/app/1583720/Entropy__Zero_2/
https://store.steampowered.com/app/1117390/Snowdrop_Escape/
https://store.steampowered.com/app/1389950/Amalgam/
https://store.steampowered.com/app/290930/HalfLife_2_Update/
https://store.steampowered.com/app/270370/Lambda_Wars/
https://store.steampowered.com/app/261820/Estranged_Act_I/
https://store.steampowered.com/app/17520/Synergy/
https://store.steampowered.com/app/397680/FIREFIGHT_RELOADED/
https://store.steampowered.com/app/587650/HalfLife_2_DownFall/
https://store.steampowered.com/app/658920/HalfLife_2_VR_Mod/
https://store.steampowered.com/app/747250/HalfLife_2_Year_Long_Alarm/
https://store.steampowered.com/app/311810/Operation_Black_Mesa/
https://store.steampowered.com/app/265630/Fistful_of_Frags/
https://store.steampowered.com/app/1057700/Battle_Grounds_III/
https://store.steampowered.com/app/977050/Action_Source/
https://store.steampowered.com/app/1154130/Logistique_Act_1/
https://store.steampowered.com/app/346330/BrainBread_2/
https://store.steampowered.com/app/869480/Jabroni_Brawl_Episode_3/
(REQUIRES HL2: EP2)
https://store.steampowered.com/app/747250/HalfLife_2_Year_Long_Alarm/
https://store.steampowered.com/app/2224920/Evacuation/

Portal 1 & 2 Mods

https://store.steampowered.com/app/280740/Aperture_Tag_The_Paint_Gun_Testing_Initiative/
https://store.steampowered.com/app/317400/Portal_Stories_Mel/
https://store.steampowered.com/app/1255980/Portal_Reloaded/
https://store.steampowered.com/app/446750/Portal_Stories_VR/
https://store.steampowered.com/app/317790/Rexaura/
https://store.steampowered.com/app/286080/Thinking_with_Time_Machine/
https://store.steampowered.com/app/1810070/Aperture_Salt_Mines/
https://store.steampowered.com/app/601360/Portal_Revolution/
https://store.steampowered.com/app/433970/Destroyed_Aperture/
https://store.steampowered.com/app/440000/Portal_2_Community_Edition/
https://store.steampowered.com/app/2015420/Portal_Versus/

Noteworthy Source mods not on Steam

Team Fortress 2 Classic[tf2classic.com]

Open Fortress[openfortress.fun]

Team Fortress: Invasion

Goldeneye: Source[geshl2.com]

Pre Fortress 2[prefortress.com]

Team Fortress 2 Vintage

Misc.

Guide on how to install Gunman Chronicles, a game (mod) for Goldsrc: https://steamcommunity.com/sharedfiles/filedetails/?id=1135681015

Guide on how to install Codename: Gordon:
https://steamcommunity.com/sharedfiles/filedetails/?id=1702718188

Guide for setting up mod integration with outside Source mods:
https://steamcommunity.com/sharedfiles/filedetails/?id=835920750
https://steamcommunity.com/sharedfiles/filedetails/?id=1471028432


Thank you for viewing my list, and I hope you find a mod you enjoy!

[ibuprohpen]

Add cry of fear!

[Two Tailed Fox]

honestly its kinda weird that gmod isn't on here but jbmod is, since its probably the most popular and well known source mod out there.

Although tbf jbmod did inspire gmod.

[JohnRDVSMarston]

Nice list of mods; there were some I haven't played yet
By the way, here's more to add:
- AQtion
- Black Mesa
- Cry of Fear
- Double Action: Bogaloo
- Estranged: The Departure
- G String
- Half-Life: Absolute Zero
- Prospekt
- Sven Co-op
- Transmissions: Element 120

[hey boys its a spah!]

[duddlee]

i added pre-fortress

[hey boys its a spah!]

ok cool, but why is this on tf2 guides, there are just 3 team fortress mods in here and you didnt even mention pre fortress 2.

[harold bryne]

soo litty fammm sooo lit!!!!!! THX Audio

[big raul]

much appreciation

[roody]

chris pratt mario gaming

[duddlee]

You're Welcome