If you're going to take this game because of the achievements, take note that you will need to do the game 9 times in the different levels to get them all. 145 achievements per walkthrough.
Otherwise, it's a good roguelike. Nothing amazing but worth the try.
Tons of classes, unlockables and a huge map to explore, you will need a lot of time to beat it.
You can extend your gameplay by adding mods from the workshop to your game.
It's quite hard to get used with the controls. Also, you have the choice of exploring a map manually with the arrows or automaticly with the "Z" button. Anyway, the automatic explore won't follow the quest you are doing. Some quests will tell you to go somewhere but it won't show on the map, it only tells you some hints like go northwest from the forest.
The progress of the game is also too fast, you will sometimes get to a boss when your level is still too low. Your only way to farm is to go to harder dungeons.
Finally, I hope you like to die because you will die really much in this game. Dark Souls in 2D.
As I said, it's worth the try.