If you've heard about Daemonica in passing, perhaps you've already made a few basic assumptions. After all, if it looks like Diablo and sounds like Diablo, it's probably a lot like Diablo, right? In fact, let's go over the tried and true checklist of ye ol' dungeon crawl:

Medieval setting during plague-infested times... check
World threatened by supernatural beings... you betcha
Lonely hero fated to battle evil at great sacrifice... right here
Swords, sorcery, and legends revived... oh yeah
Side quests, potion-making, and deadly opposition... bingo
Third-person perspective with isometric, 3/4 view... screenshots don't lie
Creepy title with hellish overtones... Self-evident