Classic adventure game
The atmosphere is great, reminds me of diablo 1 a little bit; perhaps because it was the same time period, or similar (or so I think). The sound is excellent, the story is just awesome and the gameplay is surprisingly good. The playing perspective is like Dungeon Siege, but remember - this is a quest, not a rpg like that one.
The fights are rare, they are at most necessary for the story; fighting is simple and minimal, you have hit and block and that's it - not that you'd need more - it's a quest after all.
One thing I found peculiar is that the rats are kind of big. I believe that this is intended though, to show that they were many rats in that period carrying the bubonic plague (also known as the Black Death which is mentioned in the game and is part of the story).
Now let's get to the part where you can hear what's wrong with the game :P
The game has too many loading screens, that even on a high-end system last at least 10 seconds. Here I should mention that you will despise them and get bored to death if you have a slower pc as they'll take a long time and you'll see them very often. Well that's the only thing "wrong", the next to follow could just not be so... enjoyable to certain players:
At first you might walk around not knowing where to go, until you learn the map and discover the locations - but you need to travel a lot anyway, so... get used to it :P
You also have to go hunting for herbs (plants, flowers) to make your potions - again, you have to know the map in order to know where to find them and that means you need to walk around the map a lot. Some people might not enjoy that... but it's sort of expected in this game. It would be weird not to walk and search for them.
There is a bit of reading involved - so if you're just looking for a game where you solve various puzzles - this is not the game for you. The story is in the texts. :)
The game has few bugs, minor at most and just like any fan of the genre would rate this game highly, so did I.
I have to say it but I didn't expect so much from such a small game though. Excellent!