DreamedArtist: Achievements is a false sense of accomplishing something your really not.
Don't let that change your perception of a company. just be happy we got a good working game with recent updates and it's DRM Free! :)
I disagree with those statements, and I assume other Achievement fans would also.
There is no good excuse for THQ Nordic - and/or any other publishers/devs - to include features into their games on other platforms but then not bother to include those same features on the GOG version. That includes features that not everyone likes, i.e. Achievements.
That is not treating all customers equally. In THQ Nordic's case (and all other publishers/devs who do likewise, of which there are many), it's privileging Steam customers by giving them more value/features for the same product, and treating GOG customers like second-class citizens by giving them a sub-par product that has less value/features.