This game is fun, but very very complicated... unless you know what you're specifically aiming for, you won't 100% this through sheer luck. That being said, it is very enjoyable, and all the sheer magnitude of different variations of what you can do to Elodie's life (the main character) is astonishing! You can turn her into anything from a benevolent saint-like super queen to a demonic-ish sadistic servant of an evil king who'd blow up her father as soon as hug him! Or... you could drown in a sea of really really mad peasants... T_T
Finding all the ways Elodie can die is almost as much fun as figuring out how to make her an effective queen, actually, and is one of the achievements!
Also, for the badge hunters out there, this game has trading cards!
I recommend this game if you like highly detail-oriented games, like D&D 3rd edition and whatnot... if you're like me and find making the characters in it the most fun part, anyways. It's pretty much creating a character sheet if the character creation was on steroids, with the rest of the game as a sidenote. =^_^=
If you're worried about achievements, don't worry at all! There are guides that will give you all of the achievements, right on steam. Only downside is that you will have to replay the game a TON for 100% achievements (if you consider that a downside. Some will, but I'm sitting on the fence about it). Good news is that each playthrough doesn't take too terribly long, being 40 weeks/turns at the longest (1 turn/week = 1 set of 2 lessons, 1 castle activity, and whatever cutscene decisions for that week)
100%ing the achievements can take as little time as 12 hours (possibly less). I skipped what could be skipped after reading everything once, always online, but unsure of how much of that 12 hours was "dead time".