I then cut internet to see if it would launch. Still launched, even though it opened the app. I don't know if anyone has any more information about what the DRM situation is with these games, but I couldn't find much with some googling (everything mentioned Twitch, not this Amazon Games app). Is this app basically Galaxy-style DRM as opposed to, say, Origin?
You can play many games on Steam offline too, that doesn't mean they are DRM-Free. DRM comes in many forms, not just as an always-online requirement.
If you want to know whether the game is truly DRM-Free, quit the Amazon launcher, go to its executable and try to launch it. If it launches WITHOUT starting the Amazon launcher, then it is DRM-Free. If the Amazon launcher starts, then it is using DRM.
Remember, we want DRM-Free games not just for the offline play, but for offline installation. Many DRMd games are playable offline after the 1st activation and / or with cached signed-in launcher running in the background. It's this authentication that's the problem.
If you ever lose your account, or have to reinstall the game offline, or the store shuts down, you will no longer be able to make that 1st time authentication and you will lose your game. This is why we go to GOG. It's not just about playing offline, it's about not having to activate the game... ever, assuming you download and store your offline installers.
A little aside:
Out of boredom, I gave that "Amazon Luna
" streaming service a chance for the first time yesterday and played RE 2.
I was surprised how well it worked.
I honestly wasn't able to notice any difference between playing via that streaming service and playing a copy installed on my PC.
My problem with streaming is:
1) Content comes and goes. That's why I still buy Blu-Rays, rather than relying on Netflix and its clones.
2) Saves are probably inaccessible to you. I doubt they let you download, edit and reupload them.
I can confirm that Amazon Prime Games giveaways tend to be mostly, truly, DRM-Free.
My process of playing games given away completely offline and without the necessity of using Amazon Prime Games Launcher is done by using Nile: https://github.com/imLinguin/nile
I download my games, back them up in .7z with high compression, transfer them to my offline Windows 10, and play them without problems. All games I've tested from Amazon Prime Games usig this method are, indeed, completely DRM-Free.
And Im 100% with you in streaming.
Unfortunately, its not that viable to buy every single movie that we enjoy out there in Blu-Ray as not everyone can afford this kind of practice too.
Still, they normalized streaming so that we do not own the content and are always in need to use their services.
Problem is when, as happened many times before, movies or series disappear from their services for 'legal reasons' and we just lose access from what we paid for.