An extremely fun, extremely adult RPG made by some polish company based on a polish fantasy book series. You play Geralt, an amnesiac monster slayer mutant (hence the title 'witcher') where he goes on a quest to recover his memories and solve another encompassing mystery.
The game has it's typical fantasy staple of elves, dwarves, and so on. But the setting and mood are anything but. The game seems much more interested in topics of racism, classism, politics, religion, etc. than it is in dragons and fairies.
The bestiary in the game is huge, at least it feels huge. The diversity of monsters encounter is pretty intense. Man eating plants, slug creatures, gargoyle looking things, wyverns, undead goblin things, demon dogs, golems, werewolves (mentioned, not seen yet), a cockatrice, a four legged spider thing, and a bunch of other stuff I forgot.
And the large bestiary isn't interesting only because of the diversity of different stuff to kill, but for the different ingredients the creatures drop, which can be used for potion brewing, which gives a ridiculous amount of variety to your character. Ranging from the typical restoring health, curing poison, to wildly helpful such as seeing in the dark (which you will need) and seeing invisible opponents.
You advance your character via a talent tree, which though not particularly wowing, at the very least functions competently which is more than enough to ask for. The combat system is focused largely around chaining combos with your sword attacks (Geralt has no ranged attacks aside from some spells) via mouse clicking when the cursor turns to flames. Which could sound a little boring or maybe easy, but it's anything but, the game is hard and you will die from time to time. What adds more strategy to the combat is the different sword styles you can adopt, which boil down to strong, quick, and group. They are all necessary so you won't be hogging the fast style or anything, and to add one final layer of complexity, there are two sword types (steel and silver) to juggle when in combat, one is particularly effective on humanoids, while the other is more suited for monsters. Pretty good concepts really.
Final note, the game is kind of sexist really. Though none of the women are really portrayed as stupid or bumbling or particularly inept, almost ALL of them are whores (with a couple of exceptions) and with minimal effort will have sex with you haha. I'm about a 1/3 through the game and I've had sex with probably six or seven different women. Perhaps this is to illustrate some dark ages status quo. The truly funny thing about the sex though is after each girl you lay, you get this nude playing card of the girl. Kind of weird, funny, whatever.
All in all, incredible game, great story, combat, themes, the dialogue is clunky at times, but forgivable. There's so much to do it's insane. It's a jam.