the studio that produced it is one of the best, or simply the best.
but there are no 'best' games actually. one would be best for you if you are into shooting, another be for me, if I am into stealth, the 3rd one will choose some fantasy-RPG-style aka Skyrim... etc etc etc.
Witcher 3 is a damn good game -- so was Witcher 2, and Witcher 1, too.
I can name a few others: Dishonored (1+2), Prey, Fallout (2, 3, and NV but not later). FarCry3 was a great game for me I spent like 3.5 hours in multyplayer even despite it was so glitchy and buggy). Orion Dynohorde (survival game against dynos) is one of my faves. but it is quite silly... not outstanding one. but its outstanding for a game that costs 1/2 euro (I am not joking!) Painkiller (Black edition) also was one of my faves... but note these are pretty old, yeah.
golden luck to you.
I only played Gwent from CD Project and was great! Unfortunately it won't be maintained anymore for PS.
Recently I bought Watchdogs and Watchdogs2 but The Witcher 3 will be the next one, for sure!
Thank you for your recommendations and comments! I will check those games too!