If this game wasn't an obscure Win95 era title, it would be a classic that stands shoulder to shoulder with other early CRPGs. Though it lacks the story of an Ultima or Might&Magic, it definitely has as many hours of gameplay, possibly more. You build a stable of adventurers to explore the dungeon. Each class has a set of spells and different combat abilities, and you can multi-class after getting far enough to get the spells you want. You could try to go with one super utility knife hero, or make a party of up to 4 specialists. It's a very zen dungeon crawler. You level up, find better gear, get strong enough to make it farther on the floor you're leveling on, find some magic stuff, get over confident and push too far, get destroyed by high level monsters (probably due to pitfalls), then get back to getting stronger. Maybe you take a break and roll up a new caster from a different guild to try different spells. Oh, you can charm any of the monsters and bring them as companions? That's awesome. Teleport spells? Boy that would make getting around those walls quicker, and help if I fell down a pit, I could go right back up. AoE spells that take out 4 groups of 3 enemies with a single cast? Wow, I just double leveled up.
If you go in knowing this is a window based, map/viewport game from the 90s, you won't be disappointed. It has no plot, other than "get to the bottom of the dungeon and get strong enough to get there along the way", but if you like playing your own characters, progressively getting stronger, and a really strong sense of progressive exploration, it's great.