It's not. It's a system to prevent tampering with whatever DRM solution you are using. Similar to a digital signature, but much more robust.

That sounds like another layer of DRM to me.

dont bother
it hasnt gotten any better in 10 years
it lost it's crown of shit to sonic boom which is an even worse game
but thats hardly a glowing recommendation

Sega has never listned to anything since they killed off the dreamcast, they are just sitting on a ton of great console games past and just keep maing shitty buggy war games and what not.

You are being told the cold, hard truth, yet you decided to say no it's not nadda nadda waaahh wahh.

This is why I'm sick arguing with people who never use their brain.

sega had to get out of the console business
sony was demolishing them and they were bleeding money
if they didnt get out when they did they would have gone bankrupt
the csk co founder donated 700 million before he died to bail sega out thats how bad their financial situation was

but they are sitting ona goldmine of arcade and console games they just refuse to re release in lieu of more sanic

Yah, so whaddya call this non-DRM, DRM enhancement? Or maybe DRP? lol

You call it whatever you like, as long as you can understand what it is. And what it is is an anti-tampering mechanism (so, ATM I guess?).

In technical terms you're correct, but generally speaking, it's DRM because it's sole purpose is protecting digital rights.

It's sole purpose is preventing tampering. The fact that it's mostly used to prevent tampering of DRM does not make it DRM.
Example of a potential DRM Free Denuvo implementation: You have the full game files, but the Denuvo protected executable only loads the first map. You can freely move the game files to any computer, you can be online or offline, but the executable will not allow you to play other maps. There are no accounts, no 3rd party checks, so the game (or demo) is DRM Free, even though it does use Denuvo.
The problem is that Denuvo does cost money to use (licensing etc) so few are willing to use it for reasons other than to protect a DRM system.

If this example isn't DRM, what is it?

(Appreciate your feedback. Always like to learn more.)

I don't see how a game you can move and play on any computer you like without any checks is DRM, even if you cannot modify the game's files. If you believe the ability to modify the files is paramount for a software to be considered DRM Free, then yes, Denuvo denies modification, so it would count as DRM in that case.

But most would agree that if you are able to install and execute the software on any number of computers, online or not, without any kind of checks, the software is DRM-Free.

It seems to me to be DRM, though more along the lines of Adobe Acrobat. And certainly preferable to the Steam model. But what good is a game that only loads 1 map?

A demo? You can distribute it freely, then only need to change a single file for access to the full game.
But just an example of how you can use the anti-tampering mechanism for reasons other than DRM.

I still see this as relating to DRM, but potentially much better than Steam from an end-user perspective.