Milky Way Prince – The Vampire Star (https://store.steampowered.com/app/1302050/): Tested the Windows version. Already listed in the wiki, but it's listed wrong. From what I tested, you need to create a steam_appid.txt file in the same folder as "MILKY WAY PRINCE.exe" and add the game's ID (1302050) in the .txt file.

Tales of Beasteria (https://store.steampowered.com/app/1203030/): Tested the Windows version. Soon to be removed. Works right off the bat, no special setting up needed.

Detective Grimoire (https://store.steampowered.com/app/272600/): Tested the Linux version on Ubuntu. Also already listed in the wiki, but I think it's worth mentioning that, to get it running, I had to install two dependencies, libgtk2.0-0:i386 and Adobe AIR.
- To install libgtk2.0-0:i386, I had to run the command sudo apt install libgtk2.0-0:i386
- To install Adobe AIR, I had to run the command wget -O adobe-air_amd64.deb http://drive.noobslab.com/data/apps/AdobeAir/adobeair_2.6.0.2_amd64.deb then install the downloaded .deb package.
- About Adobe AIR, if you use a distro with a x86 architeture, you can probably get the .deb package from the command wget -O adobe-air_i386.deb http://drive.noobslab.com/data/apps/AdobeAir/adobeair_2.6.0.2_i386.deb

Not sure if anyone else has tried running this game without needing Steam, but it seems like YAIBA: Ninja Gaiden Z is DRM-free on Steam by launching the game directly from NRZGameLauncher.exe (not NRZGame.exe). The game came with a steam_appid.txt file containing its Steam App ID and I was able to play a couple of levels so far without being prompt to log into Steam.

Was anyone able to test Nicer Automata, since Denuvo was removed from the game yesterday?

Yes, but sadly it still needs Steam to run.

Does anyone know if sdk apps like Hammer can be run outside of steam? And what the experience is like if so?

Pode is DRM Free. Works straight from the .exe. No tricks needed and the save fie even seems to be cross compatible.

Windows 7

https://store.steampowered.com/app/944080/Pode/

Thanks for letting me know. I was hoping that Square would repeat the pattern they had with Final Fantasy X / X-2, FF12, Dragon Quest 11 S, and Trials of Mana, but I guess I should have known better.

Shattered Tale of the Forgotten King works DRM Free.
https://store.steampowered.com/app/1045180/Shattered__Tale_of_the_Forgotten_King/
Tested: 26.7.2021

Mail Mole works without Steam running. No special tricks needed and saves seem to be cross compatible.

Windows 7.

https://store.steampowered.com/app/1273540/Mail_Mole__Xpress_Deliveries/

Daymare: 1998 is DRM-free. I'll be updating the wiki soon.

Sorry for the slight off topic, but what about what I asked in the post #1665? (from July 8th, in case the link doesn't work)