Serment is an interesting hybrid of visual novel, dungeon crawling and dating sim style management elements. It actually ties all of these genres together nicely, but the dungeon crawling definitely takes center stage. You do get to choose between four different heroines and all of the dungeons are hand crafted instead of procedurally generated. The fact that you are on a strict time limit to earn enough cash to pay back the devil who resurrected you can make it feel like you are forced to fight in the dungeons most of the time. However, the game does give you the freedom to continue playing after completing the main story.
Gameplay: Plenty of dungeon crawling along with some visual novel segments and even a bit of dating sim style time management.
Graphics: Beautiful character designs and backgrounds, but the dungeons look a bit bland in comparison.
Sound: The game features no voice acting and the music is decent, but unmemorable