Despite not being listed, it does have controller support and plays like a dream on Windows 11.
I just want to get a few technical points out of the way. Firstly, upon starting the game on 26 August 2022 for the first time, the achievement "Part-Time Hero" instantly unlocked - that achievement is for unlocking half of the achievements in the game! Maybe someone can let me know if that has been patched since. Secondly, It looks like the GOG version will not be enjoying the Halloween Spooky Update 1.05 (as of 25 October 2022) although it is described as a DLC update. I suppose this is the usual trade-off for going with GOG DRM-free instead of Steam. Putting that all aside, this game is definitely a return to form - I must admit, I have not played Serious Sam 4 so I was comparing this with the First and Second Encounters. You will, however, notice the increased expansive (almost open world) levels which might be daunting for some, but consider it progress in gaming tech! If you enjoy Serious Sam games, you will find this very satisfying.
... finally! I am rather selfish about this but I am actually glad that they removed the online multiplayer aspects from this game. Many hated it on the other platforms because it forced achievement hunters to go online to complete the full list. I really do wonder if they will do the same for Rise of the Tomb Raider. There I go being presumptuous. I had a strong feeling that the Tomb Raider trilogy would come to Gog.com given that Deus Ex Human Revolution and Mankind Divided arrived here safely. Fingers crossed 🤞🏻
And that is the problem. Why would they port the PS1 version? The characters have reduced animations due to the limitations of the PS1's hardware plus this version has minimalist menus and original arcade music as opposed to the superior console arranged soundtrack. Those craving nostalgia might still go for it.
