Some Game Mods have their own work pages; this index is meant to collect them all in one place.
0 A.D.
ARMA II
Battlefield series
- The Binding of Isaac: Antibirth (later incorporated into the base game as DLC)
Civilization IV
Command & Conquer: Red Alert 2
Command & Conquer: Red Alert 3
Command & Conquer: Tiberian Sun
- Dawn of the Tiberium Age (later released as freeware game)
- Twisted Insurrection (later released as freeware game)
- After the End: A Crusader Kings II Mod
- Crisis of the Confederation
- Crusader Kings II Game Of Thrones Mod
- The Four Nations An Avatar The Last Airbender Mod
Dark Forces Saga Jedi Academy
- DDLC Purist Mod
- Doki Doki: A Brand New Day
- Doki Doki Rainclouds
- Doki Doki Salvation
- Our Final Heartbeat
- Monika Before Story
- Action Doom 2: Urban Brawl
- Aetherius
- The Adventures Of Massmouth
- The Adventures Of Square
- Batman Doom
- Brutal Doom
- Call of Dooty
- Chex Quest
- Demonsteele
- Genesis Saga Aurora
- Ghouls vs. Humans
- GMOTA
- Grezzo 2
- Guncaster
- Insanitys Requiem
- Hacx
- Harmony
- Hideous Destructor
- High Noon Drifter
- Highway Acceleroid Booster
- Mega Man 8-Bit Deathmatch
- Project Brutality
- Quake Champions: Doom Edition
- Reelism
- REKKR
- Russian Overkill
- Shadow of the Wool Ball
- Sigil
- Sonic Robo Blast 2
- Trailblazer
- TurboCharged ARCADE!
- Viet Doom
- Zdoom Wars
The Elder Scrolls III: Morrowind
The Elder Scrolls IV: Oblivion
- Amorous Adventures
- Beyond Skyrim
- Conan Hyborian Age
- Enderal
- Falskaar
- Frostfall
- The Forgotten City (currently being adapted into a stand-alone game)
- Interesting NPCs
- Relics of Hyrule
Escape Velocity Nova
- Autumn Leaves
- Dog City Denver
- Fallout Dust
- Five Nights at Vault 5
- For the Enclave
- The Frontier
- Hell on Earth
- More Perks Mod
- New California
- The Rockwell Series
- The Someguy Series
- Tale Of Two Wastelands
- A World of Pain
- A Cannibal In Concord
- Concussion
- Old World Radio
- Vault 1080
- Maxwell's World
- Tales from the Commonwealth
- Sanctuary Hot Springs
- Vault 83: The Librarian
- Fallout UIF
- Ancient-Shivan War
- The Babylon Project: Started as a Game Mod for FreeSpace 2 but ended up a standalone game that just uses the FS2 engine.
- Blue Planet
- Derelict
- Dimensional Eclipse
- Inferno
- Just Another Day
- Silent Threat: Reborn
- Wings of Dawn
Freedom Force series
- Afraid of Monsters
- Cry of Fear (Later remade as a commercical game)
- Counter-Strike (Later owned by Valve)
- Cthulhu: An Unspeakable Mod
- Heart of Evil
- Jamie's Mod
- Nuclear Winter
- Pirates Vikings and Knights (It's sequel Pirates, Vikings and Kinghts 2 got released on Steam)
- Poke646
- Scientist Slaughterhouse
- The Specialists
- Sven Co-op (Later remade as a commercial game)
- Sweet Half-Life
- Team Fortress Classic (Originally named just Team Fortress under used from Quake engine until later owned by Valve)
- They Hunger
- Zombie Panic
- Black Mesa (Later remade as a commercial game)
- Black Snow
- The Closure
- Day Hard
- Dear Esther (Later remade as a commercial game)
- Dystopia (Later remade as a commercial game)
- Fistful of Frags (Later remade as a commercial game)
- Garry's Mod (Later remade as a commercial game)
- Get a Life
- Iron Grip
- Grey
- The Hidden
- Hunt Down The Freeman
- Terminal 7
- Insurgency: Modern Infantry Combat (Later remade as a commercial game titled Insurgency)
- Korsakovia
- MINERVA: Metastasis (Later remade as a commercial game)
- Missing Information
- Mistake of Pythagoras
- NeoTokyo (Later remade as a commercial game)
- Nightmare House
- No More Room In Hell (Later remade as a commercial game)
- Research & Development
- Sarma Cube
- The Stanley Parable (Later remade as a commercial game)
- Underhell
- Equestria at War
- Kaiserreich: Legacy of the Weltkrieg
- The New Order Last Days Of Europe
- Old World Blues
- Red Flood
- Red World
- Thousand-Week Reich
- Iji_MSPFA (the mod of the Interactive Comic of the game)
- I Wanna Kill the Kamilia (taken Up to Eleven in that while it modifies some original levels, it is mainly a mod of other fangames)
Knights of the Old Republic II
- Mega Man X3 - Zero Project
- Rockman CX
- Rockman 2 Deus Ex Machina
- Rockman Exhaust
- Rockman 4 Minus Infinity
- Rockman No Constancy
Stackable Mods
- The Aether
- Adventof Ascension
- The Lord of the Rings Mod: Bringing Middle-earth to Minecraft
- Mo' Creatures
- Millenaire
- OreSpawn
- Thaumcraft
- The Twilight Forest
- Technic Pack
- BuildCraft
- Lycanites Mobs
- Blightfall
Overhaul/Conversion Mods
Maps
- 1866: A Mount & Blade Western
- Anno Domini 1257
- Europe1200
- Gekokujo
- The Last Days (of the Third Age of Middle Earth)
- Light & Darkness: Heroes of Calradia
- Phantasy Calradia
- Prophesy of Pendor
- The Reckoning
- Solid & Shade
- Star Wars Conquest
- Sword of Damocles
- The Aielund Saga
- The Bastard of Kosigan
- A Dance with Rogues
- d20 Modern Neverwinter Nights
- Gladiatrix
- July Anarchy
- Tales of Arterra
- Dragonball Z Team Training
- Moemon
- Pokemon Adventure Red Chapter
- Pokemon Blaze Black And Volt White
- Pokemon Blue Kaizo
- Pokémon Brown and Prism
- Pokemon Crystal Clear
- Pokémon Crystal Enhanced
- Pokemon Crystal Kaizo
- Pokémon Dark Rising
- Pokemon Emerald Kaizo
- Pokémon False Red
- Pokémon Flora Sky
- Pokemon Gaia
- Pokemon Light Platinum
- Pokemon Moon Emerald
- Pokémon Quartz
- Pokémon Snakewood
- Pokemon Stadium Kaizo
- Pokémon Sweets Version
- Ponymon Dawn And Dusk
- Pokémon Vietnamese Crystal
- Touhou Ningyougeki
- Twitch Plays Pokémon Crystal Anniversary (stand-alone version)
- Portal: The Flash Version
- Portal: Prelude
- Blue Portals
- Aperture Tag: The Paint Gun Testing Initiative (Later released as a commercial game)
- Portal Stories: Mel (Later released as a commercial game)
- Portal Stories: VR
- Repercussions (Still in development since at least 2013)
- Urban Terror (Later released as a standalone freeware game following the release of the id Tech 3 source code)
- Amy Rose in Sonic the Hedgehog
- Robotnik's Revenge
- Sonic Erazor
- Sonic Mania & Hatsune Miku
- Sonic the Hedgehog Megamix
- Sonic the Very Useful Engine
- See Recap.Star Trek Online for missions created with the Foundry Level Editor.
Super Mario Bros. games
- Book of Mario: Thousands of Doors
- Brutal Mario
- Chaos CompleXX
- Fishing Season
- Hammer Brother
- Kaizo Mario World
- Koopa Kingdom Escape
- Mario Adventure
- MARIO by M A R I O
- Mario Gives Up
- Newer Super Mario Bros. DS
- Newer Super Mario Bros. Wii
- The Second Reality Project
- An SMWC Production
- Something
- Star Revenge
- Super Mario Bros. 3Mix
- Super Mario Star Road
- Super Demo World: The Legend Continues
- Super Mario 64 Chaos Edition
- Super Mario 64: Last Impact
- Super Mario Bros. 3X
- Super Mario Bros 5 Reborn
- A Super Mario Thing
- Super Mario Galaxy 2.5
- Super Pansy World
- the
- Super Mario World: Piranha Island
- Super Pony All Stars
- Yoshi's Island: Kamek's Revenge
- Ballistic Weapons
- Killing Floor (Later remade as a commercial game)
- Out Of Hell
- Red Orchestra (Later remade as a commercial game)
- Defense of the Ancients: All-Stars (later remade as Dota 2)
- Rise of the Blood Elves
- To the Bitter End
- Wanderers of Sorceria
