To set the scene a little, this is a single-player stealth game about running around assassinating various targets across a bunch of different missions. It's actually a pretty good game and it has a Linux build available on Steam ported by Feral Interactive, which is not up on GOG.
Here's the problem: many features in HITMAN require you to have an internet connection. This is different to a game that has online modes which would of course need the internet. This is a game you play by yourself. Story missions and bonus mission can be played offline but you have to be online for most of the progression for item unlocks, new start location unlocks, special contracts, featured contracts, escalation missions and more.
It might not fall under the technical meaning of DRM but forcing players to be online in a single-player game to access content never really goes down well, and so it's not surprising on a store like GOG for users to be unhappy. It didn't help that GOG did not mention any of this at release, simply slapping the usual "DRM FREE. No activation or online connection required to play. " tickbox on the store page. While it's still somewhat true it doesn't quite sit right. This has led to the Hitman release gathering one of the lowest ever user-ratings on GOG (1.4 / 5 right now).
GOG users wasted no time telling the store how they felt with over 1,000 comments on the release forum topic, with IO Interactive being aware of it stating in a recent livestream that they're following it and they say they're in discussions on it. Two days after release GOG posted this small statement in that same topic that reads " Thank you for bringing this topic to our attention. We’re looking into it and will be updating you in the coming weeks. In case you have purchased HITMAN and are not satisfied with the released version, you can use your right to refund the game. At the same time, while we’re open for meritful discussion and feedback, we will not tolerate review bombing and will be removing posts that do not follow our review guidelines.". Another post later clarified that " We will not remove reviews like that, only those that are against our review guidelines.".
Stating that unhappy users writing about actual technical features of the game is "review bombing" of course is really not going to go down well. The base price of the game on GOG (when the sale ends) is noticeably more expensive than on Steam too.
Later GOG added a notice to the top of the store page that reads "Please note: Internet connection is required to access Escalation missions, Elusive Targets or user-created Contracts. Story and bonus missions can be played offline.".
How do you feel about this?