An GOG staff claimed that GOG was the only DRM-free digital distributor for PC games.
No, it is not.

Game stores with multiple categories:
Crytivo
- You get an DRM-free copy of the game on the site. (Detail)
- Every purchase gives you "Crytivo Coins" which you can use to lower the price of your next purchase.

DLGamer

Epic Games
- Please append the option -EpicPortal to executables or make shortcuts

FIREFLOWER GAMES
- Exclusively DRM-free, and carries quite a few titles that are not sold at GOG.

Game Jolt

Gamebillet
- You can select and view DRM-free category.
- Download your DRM-free installers as soon as possible.

GamersGate
- You can download DRM-free installers with SirPrimalforms' old trick

Gamesplanet
- Sells some GOG keys.

GOG
- I have over 1000 games here.
- In the past, 99% of my digital downloaded legal games were GOG version.

Groupees
- they mention in the bundle page if the games need to be activated elsewhere or if they're DRM free

Humble Bundle
- Some DRM-free games here have more updated version than GOG version.
- That is, some developers love Humble Bundle more.
- (Well, some GOG games have more updated version than Humble Bundle version.)
- Sells some GOG keys.

indiegala
- indiegala freebies are usually DRM-free downloads.
- Their ebooks catalogue, part of their eroge catalogue and some of their bundles are also DRM free.

itch.io
- Many games here are time-limit 100% off, you can grab them totally free.

Matrix Games
- Copy-protected by "cd-key" but you can backup game files after you installed it.
- You can also select physical shipment.

Nutaku
- Click "PC" and then "Paid Games." You'll see dozens of DRM-Free titles.

Steam
- No, I am not joking. Steam do have many DRM-free games.
- Once you downloaded those true DRM-free games, you can backup them as you like, and run the game everywhere without Steam client installed. [1] [3]

WinGameStore

Zoom Platform
- Exclusively DRM-free, and carries quite a few titles that are not sold at GOG.

Game stores focused on visual novels or NSFW games:
Denpasoft
DLsite (English)
DLsite (Japanese)
FAKKU!
JAST USA
Kagura Games
MangaGamer

Developers that have their own store AND do sell DRM-free games:
3D Realms
6502 Workshop (Nox Archaist)
Alivesoft
Arcen Games
Bitmap Bureau (Xeno Crisis)
Caravel Games
Grid Sage Games (Cogmind)
dgray (also sell The Hugo Trilogy and The Nitemare-3D Trilogy)
Enlight Games
Knuckle Cracker [2]
RedCandle (DETENTION, DEVOTION)
Ludeon Studios (RimWorld)
Sleepy Duck (Learn Japanese To Survive!)
Soldak [2]
TLK Games
Winter Wolves

Many developers use Humble Widget on their own site, which will not be listed in this section.

Wait for further confirmation:
Project EGG
- Games sold there has DRM but you can bypass it after launched the game at least once (HOWTO)

SQUARE ENIX gave an DRM-free Hitman.

Uplay gave an DRM-free Rainbow Six.

[1] Steam games you can play without the Steam client
[2] use one-time key activation (not server based)
[3] Getting DRM-Free Games at Steam

(placeholder)

You can also include https://www.zoom-platform.com/#home

Funnily enough, it appears Duke is still being sold on Zoom - https://www.zoom-platform.com/#store-duke-nukem-3d-atomic-edition. Maybe somebody forgot to send them a memo? :P

And Overlord 2 is sold there, but not on GOG yet. Strange because you'd think Codemasters would get more sales here.

true, but gog is second to none.

Both ADDED, thank you!

Game Jolt: I've never bought anything there, but all the free games and demos I've downloaded were DRM-free.

That phrase always bothered me. :P

-They're first.
-No they're second.
-So then who's first?
-No one.
-So they're first?
-No, they're second.
-What happened to first?
-It's gone.
-Why?
-Don't know.
-But where did it go?
-Can't say.
-Is it gone for good?
-Who knows?

The Olympics start next week. Imagine if all the winners just got Silver medals. :P

Hmmm, here I was expecting tinfoil hats and salty tears. I even brought Max.

Oh well, add Abandonia to the list. It's not all DRM free, but they've got quite a few.

BTW, any source for that?

i love the winter olympics. thanks for reminding me. :)

:facepalm:


Oh, and thanks! :)

Do Abandonia sell games?
It looks not like a store.

They don't sell, but they certainly do distribute. They only have abandoned titles, so dosbox bait for the most part. It's where old timers got the good old games before GOG started selling them. Your call if that fits your list.

square enix gave a drm-free hitman. although there was no redownload from the account. you had to access it via your email. plus i never actually installed it since i own it here. so can't verify their terminology. also, i believe uplay gave an old rainbow six retail through their platform. which turned out to be drm-free. i can't verify this because it has been some time.