Kirby with headphones

Excellent Freeware List

A big list of free games. No free-to-play games, only purely free programs.

A MegaCollection

I have not necessarily played all of these games.

More games can be found under the kits.

Standalones

Cave Story (Cave Story Engine 2 Archive) (NXEngine-evo) The iconic one.
Pink Heaven (Steam) Demo of Kero Blaster with a different character.
La-Mulana (Archive) MSX-like platformer.
I Wanna Be The Guy Remastered (Itch.io) (Original Site of IWBTG) The original masochist platformer, remade for modern systems.
The Battle for Wesnoth (Steam) Open source turn-based strategy game.
Zero-K (Steam) RTS with 100+ units and terrain manipulation.
Warzone 2100 0 A.D. Widelands Open-source RTSes.
Unciv Open-source version of Civilization V.
Thrive Spore-like.
Endless Sky Space trading and combat.
Mindustry (Steam, paid) (Itch.io) Sandbox tower-defense game.
Super Crate Box (Steam) Hectic arcade platformer shooter where switching weapons gain points.
Transformice (Steam) Semi-cooperative platformer MMO.
Mibibli's Quest
(Steam) (Itch.io) (Game Jolt)
Surreal Mega Man like platformer.
N Hyper-minimalist smooth platformer. There's also N++.
Space Station 13 Role-playing game about a space station falling into chaos. Most popular game hosted on the BYOND platform.
Space Station 14 (Steam) Remake of Space Station 13 in development.
Deltarune Might not be free once the rest of the game is out.
Iji Shooting platformer that changes based on your actions.
Hyper Princess Pitch Mad top-down shooter in the style of Smash T.V. Describes itself as "...sort of a remake of DOS Operation: Carnage..."
Princess Remedy In a World of Hurt (Steam) Shooter RPG thing about healing people. Has a paid sequel.
I MAED A GAM3 W1TH Z0MB1ES 1N IT!!!1 (Steam) The 2009 Xbox Live Arcade classic returns. Great song.
Alien Swarm (Steam) Top-down squad shooter by Valve designers who were mooders. Also a release of SDK for Source.
Off-Peak (Itch.io) (Steam) Walk around a weird train station and talk to people.
Butterfly Soup (Itch.io) Visual Novel about lesbian asians.
Murder Dog IV: Trial Of The Murder Dog (Game Jolt) Mad crime visual novel.
Samorost 1 (Steam) (Itch.io) Surreal point and click game.
Sprout (Steam) Puzzle game about a seed on a journey.
Mr.Boom Bomberman clone. Also available as a RetroArch core.
Helltaker Puzzle/VN game.
Of The Killer Series Odd horror-adjacent comedy games. Walk around and weird stuff happens.
Duck Marines (Itch.io) ChuChu Rocket with minigames.
If On A Winter's Night, Four Travelers (Steam) (Itch.io) Point and click anthology.
Marble Blast Classic Mac game.
SuperTux SuperTuxKart Linux ond open-source mascot games.
Minetest Open-source Minecraft clone.
Krystal Drop Magical Drop clone.
The Most Officialest SkiFree Home Page! Contains a version of SkiFree for modern systems, by the guy who made the original.
Façade Experimental marridge counselling. Type anything to say it and the AI will react.
The Looker (Steam) Good parody of The Witness.
Yo! Noid II: Enter the Void (Itch.io) Pretty good 3D platformer.
Ascii Patrol (Online) Moon Patrol inspired terminal game.
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Classics

Contains both any original games available and any enhanced ports and spiritual successors.

The Elder Scrolls: Arena The Elder Scrolls II: Daggerfall Wolfenstein: Enemy Territory (All Steam) Bethesda's old games. Guide for Enemy Territory on modern systems.
OpenTTD (Steam) Open-source transport management simulation game based on Transport Tycoon Deluxe.
The Ur-Quan Masters Port of Star Control 2 (3DO version) to modern systems.
OpenRA (Itch.io) Open-source recreations of Red Alert, Command & Conquer, and Dune 2000.
C-Dogs SDL (Itch.io) SDL port of DOS freeware game C-Dogs. Has community-made levels.
Moriya Shrine Fansite with prepatched English versions of all the Touhou games. (Their guide)
Also see some of the websites in Find More.
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RPG Maker

Chef Boyardee’s Barkley, Shut Up & Jam: Gaiden, Chapter 1 of the Hoopz Barkley SaGa The iconic and infamous basketball RPG Maker RPG. Sequel to both this and Space Jam.
OFF Alternate download (not Fandom, with additional links) Famous old RPG Maker game.
Yume Nikki (Steam) Infamous old RPG Maker game. Has a paid 3D remake.
Grimm's Hollow (Steam) (Itch.io) (Gamejolt) Short and mildly spooky. Multiple endings.

Also see: vgperson's site in Find More

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MUGEN and IKEMEN

Ikemen GO "Remake of the IKEMEN (open source fighting games engine that supports M.U.G.E.N resources) in Google's Programming Language “Go”."
VSelect (Mirror) Edit MUGEN select screen with drag-and-drop.
Famicom Fighters 8-bit styled 6-button fighting game.
Arm Joe Les Misérables (musical) fighting game.
Teenage Mutant Ninja Turtles X Justice League Turbo Impressive and has art and music by former SNK employees.
Pokémon: Type Wild (MyAbandonware) Made by former animators of the Pokémon Anime.
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Rouge-esques

NetHack (Online/SSH/Telnet) Rougelike about discoverability, known for the dev team thinking of everything.
ZangbandTK Variant of rougelike game Angband. Also see the Zangband website.
Desktop Dungeons (Main Site) Rougelike that's actually a puzzle game. Also has a paid full version. (Steam)
UnReal World (Steam, paid) Graphical rougelike RPG set in the Far North during the Iron Age.
Brouge: Community Edition (Site for old version) A more accessible traditional rougelike. Just download the community edition.
Dungeon Crawl Stone Soup (SSH/Telnet) Well-known open-source rougelike.
Slaves to Armok: God of Blood Chapter II: Dwarf Fortress (PeridexisErrant's Starter Pack) (Steam, paid) (Itch.io, paid) The ultimate complex game. Generate a world, then look at its lore, live in it, or manage a fortress. Paid version has a built in graphical tileset and mouse controls.
DRL: Doom RougeLike Self-explanatory.
HyperRogue Non-Euclidean, world is a hyperbolic plane.
Cataclysm: Dark Days Ahead Turn-based post-apocalyptic survival game.
Spelunky Classic The first iteration of Spelunky. Rougelike platformer.
Ancient Domains Of Mystery (ADOM) (Steam, paid) (GOG, paid) Started development in 1994 and actively maintained since then.
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Rhythm Games

Stepmania Dance Dance Revolution clone and engine.
osu! Based on Osu! Tatakae! Ouendan/Elite Beat Agents.
Clone Hero Frets On Fire Guitar Hero clones.
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Competitive

Xonotic Open-source arena shooter.
Bitfighter Top down space arena shooter with level editor.
Liero Competitive worms deathmatch with grappling hooks.
Soldat Competitive 2D shooter with jetpacks.
Teeworlds (Steam) Online sidescrolling shooter.
NEOTOKYO (Steam) (Mod DB) Futuristic Counter-Strike styled Half Life 2 mod with a godly soundtrack by the Deus Ex composer. Beginners guide.
Uchu Mega Fight Pico-8 fighting game and spiritual successor to Joy Mech Fight (NES).
Ultra Fight Da ! Kyanta 2 (Steam) Ridiculous kusoge fighter.
Melty Blood: Actress Again: Current Code Community version of a fairly beginner-friendly fighting game that can run on low end hardware, with added rollback netcode. It's the one that's played in funny places.
SSHTron Tron Lightcycles in the terminal with ssh.
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Browser

Free-to-Play browser games (where you can pay money) are listed under the websites section

Cookie Clicker (Steam, paid) The ur idle game.
Melvor Idle (Steam, paid) Like if Runescape was an idle game.
Blaseball Fictional baseball simulator.
Tough Love Arena Simple fighting game.
Townscaper Demo No goals.
VGM Quiz Live music quiz.
TETR.IO Tetris.
Ocarina of Time Randomizer Sudoku Zelda themed sudoku, with mechanics based on the game.
Jinteki Fanmade recreation of Android: Netrunner.
FreeCiv Civilization but open-source and in the browser.
lainTSX Recreation of Serial Experiments Lain for PS1.
Advance Wars by Web Advance Wars in the browser.
WAD Commander Play DOOM WADS in the browser.
PrinceJS (Github) The original Prince of Persia as a browser app.
Lode Runner HTML5 remake.
micropolisJS Port of Micropolis (Open-source SimCity) to Javascript.
PCjs IBM PC emulation. Does applications, too
Yolkfolk.com Games Almost all the Dizzy games.
Line Rider The original artistic time-waster. Also see Line Rider: Advanced in other.
Free Rider HD Like Line Rider but you can control the bike.
The Wiki Game Jump from one Wikipedia entry to another.
2048 Tile-sliding.
Wordle Daily word game.
Squabble Competitive Wordle.
Acrofever Acrophobia clone.
Lichess Libre chess server. Patreon subscription just adds a profile badge.
Kung Fu Chess Real time chess.
Dinosaur Game The Chrome no internet game with leaderboards.
Tak Online implementation of this.
A Dark Room (Github) Minimalist unfolding text adventure.
Radüm (Github) Abstract strategy.
Gridland Match-3 survival.
PlayOK igGameCenter Various online board games.
hexy.games Hex and Havannah.
Chess Tempo Free chess.
ARMAGAD (also Tetrageddon Games) (Itch.io) (Gamejolt) "What the internet does to people"
Battle Of Flags RTS in beta.
Defender Of The Favicon Defender in 16x16.
Bemuse Web-based beatmania clone.
Space Awesome Oreagon Trail like by Font Awesome.
Fast Four Word Daily timed word game.
Stone Harbor Interactive short story.
Lexy's Labyrinth Unofficial Chip's Challenge emulator. More levels available here.
Amnesia : Restored The 1986 adventure game by Thomas M. Disch and Electronic Arts with restored cut content and modern UI features.
Black Room (info, Itch.io) Feminist dungeon crawler about browsers.
Duelyst.gg Fan reimplementation of the TCG tactics hybrid.
Duelyst 2 Fan sequel to the above.
Yume Nikki Online Yume Nikki and fangames in the browser with online multiplayer.
A Little Game Called Mario (Itch.io) (Github) Open-source thing where anyone can help develop or contribute.
20xx.io Melee meets Quake meets MOBAs.
Neurocracy Murder mystery told by falling down the rabbit hole on a future Wikipedia.
LikeWordle Database of games like Wordle.
Sarien.net Officially sanctioned way to play old Sierra games online with others.
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Fangames

Another Metroid 2 Remake Community Launcher Internet Archive Zip Remake of Metroid 2 GB Nintendo shot down, but you can still play it. Get the launcher, and give it the v1.1 zip. The launcher can also make an Android APK. Also has mods.
Power Bomberman The ultimate Bomberman game, complete with online.
Rayman Redemption Complete remake that makes the game so much better. Also has a level editor. And a place for those levels.
Mega Man Maker Super Mario Maker for Mega Man. Comes with account system and in-game level browsing.
Mega Man Arena Platform fighter that plays like Mega Man. Also comes with co-op boss fights.
Street Fighter X Mega Man Officially licensed fangame for both of their the 25th anniversaries.
Super Mario War (Forum mirror) (SMWStuff Reloaded α) (2.0 Fork) Famous open-source Mario multiplayer battle fangame with tons of custom stuff. I recommend getting the 2.0 fork. SMWStuff hosts more custom stuff.
Super Mario Bros X2 (X1) Extensive Mario fangame with level editor.
Psycho Waluigi Platformer about grabbing anything.
Zelda Classic Replica of The Legend of Zelda (NES). Extendable and moddable with new quests, music, etc. TV Tropes page lists some notable ones. Also available in the browser.
Super Smash Flash 2 Well-known fangame.
Super Smash Bros. Crusade (Gamebanana) Another good Smash fangame. Has a modpack, Crusade Modding Community Plus.
Super Smash Land Smash Game Boy demake from the guy behind Rivals of Aether.
Sonic Boll Mario-styled Sonic crossover platformer. Moddable (Gamebanana).
Chao Resort Island Standalone Chao garden.
Pokémon Showdown Battle simulator.
ET: Legacy Open source client and server for Wolfenstein: Enemy Territory.
Command & Conquer: Twisted Insurrection Standalone mod based on the Tiberian Sun engine.
THUG Pro Total conversion mod with extensive custom content. Requires an install of Tony Hawk's Underground 2.
The Dark Mod (Mod DB) Standalone total conversion of Doom 3 into a Thief game.
Sven Co-op (Steam) Half-Life co-op.
OpenLara Open-source Tomb Raider.
Merry Gear Solid: Secret Santa Merry Gear Solid 2: Ghost of Christmas Past Simpler, Christmas-themed MGS games.
Make a Good Mega Man Level Official site for the contest and games. Also includes guide for the Megamix Engine.
FreeSO Reimplementation of The Sims Online.
Lemmini Java game engine for Lemmings. Requires Lemmings for Windows 95.
OpenXcom Open-source clone of the original.
Ultimate Stunts Remake of Stunts for DOS.
Super Mario PC Port Central Guides and tools to build the various versions of the Super Mario 64 PC port. I recommend SM64 Plus. Requires the original ROM.
Ship of Harkinian Feature-packed Ocarina of Time PC port. Requires the version of the ROM released on the Gamecube.
Faces of Evil and Wand of Gamelon Remastered Native PC remakes of the Zelda CD-i games.
The Apprentice Project Native PC remake of one of the best CD-i games. Requires an image/ISO file of the original game.
Shang Mu Architect Freedom Planet level creator.
Earth's Special Forces Dragon Ball Z fighter and Half-Life 1 mod.

Also see: Advance Wars By Web in Browser

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Make and Play

ZZT Heaven Fansite with good resources for ZZT, famous old game known for its level creator and being made by the founder of Epic Games.
MegaZeux Like a modernized ZZT.
Knytt Stories + (Levels) (Recommended Levels) Platformer with level creator.
I Wanna Maker (Steam) Mario Maker for I Wanna Be The Guy.
Solarus Game engine for ARPGs (Zelda-likes). Launcher can download games.
BYOND Old platform for online multiplayer games. Famous for Space Station 13, Mitadake High, and Nestalgia.
VVVVVV: Make and Play edition (Page on official site) The official free level editor. Featured levels here.

Also see: Mega Man Maker in Fangames

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Other

The Unofficial Homestuck Collection Special offline browser for reading Homestuck and related media as originally intended, complete with new reader mode that hides spoilers.
The Powder Toy Physics sandbox toy.
Line Rider: Advanced Open Source version of the classic Flash art tool game. For more Line Rider, see browser games.
Skeal (Itch.io) (Web version) 5 minute Christmas-adjacent game.
YSFlight FlightGear Free flight simulators.
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Find More

Nitrome Lot of flash games, emulated with Poki.
Open Source Game Clones Open-source remakes of old games.
Awesome Game Remakes Open-source remakes of games.
Games on GitHub Open source games and game-related projects.
My Abandonware Abandonware site, 1978-2010.
Collection Chamber Abandonware games and movies.
Zomb's Lair Abandonware.
Macintosh Garden Abandonware site, focus on Macintosh.
SCUM Games (Neocities) Games for the TempleOS. See also: TempleOS in Websites.
Flashpoint Huge archive of Flash games and animations, and other internet plugins too.
rpgmaker.net Host of a whole bunch of games.
Free Games vgperson Translated Some translated RPGMaker games.
DOS Haven New homebrew DOS games.
Delicious Fruit IWBTG-style fangames.
TV Tropes List of Freeware Games Organized, also has links to other sites.
/v/'s Recommended Games Wiki Sorted by genre.
Glorious Trainwrecks Celebration games with low polish.
Mac Source Ports Old games on new Macs.
Kliktopia Games made in Klik & Play, The Games Factory, Click & Create, Multimedia Fusion and Clickteam Fusion.
Locomalito Many retro-style games.
Arcane Kids Fantastic Dreamcast-like games. For the games unavailable on their site: Perfect Stride Crap! No One Loves Me
Cool Math Games Newgrounds Famous web game portals.
David J Prokopetz's Free Steam Games (Extra games) List by prokopetz@tumblr.com
Neonaut's Freeware Games Page of Excellence Inspired what this page used to be called.
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