Nostalgic, grid-based, dungeon romp with decent graphics.
You get to choose from pre-made characters or you can customize four characters of your own. (humans / minotaurs / lizardmen / insect people) Once you pick a race, you choose a portrait and class skills. (point system -- four points per level) One annoyance about character creation is that, if you forget to name your characters, there is no reminder prompt and you get stuck with 4 characters named "New Prisoner." Sure, you could just recreate them, but I didn't really notice until I had levelled them a few times.
The equipment/inventory screen utilizes a typical "pick up an item and place it on your torso/hands/legs/feet" play style. You can find bags and chests to increase your inventory size, but you do have a weight limit which will slow your movement or make your entire party unable to walk if you're carrying too much. By mid-game, you'll find that much of your inventory weight will be taken up by food as there is a ration system in place. If you get too hungry, you will stop regenerating health and energy.
There is also an alchemy element to the game. As you journey through each level of the dungeon, you'll come across a mortar and pestle, empty flasks, herbs, and recipes. (you can also get empty flasks by consuming found potions or using potions that you have created) The main potions restore health/energy or cure poison/disease, but I believe there are a few others including a rage/berserk potion.
Combat is tactical in the sense that you can only move in a grid and must take care to move/rotate efficiently to avoid getting hit by the enemy. This is especially true when there is more than one enemy sharing the grid. There are often times when you get stuck in a hallway with enemies on both sides, though, and you end up forced to take a bunch of damage.
For ranged and melee weapons, fighting is pretty straightforward -- you right-click the weapon in your hand to attack. If you have a rogue, you can backstab if you can maneuver around the enemy fast enough. Magic is a bit trickier as you have to click the correct runes before attacking. Each spell that you find has a certain pattern of runes. If you put the wrong pattern in during combat or you put in a pattern of runes for a spell that is a higher level than your skill level, your spell will fizzle. The fact that you'll be moving around enemies while trying to pick the correct pattern, makes magic combat even more difficult. The payoff is that the spells typically do a lot of damage and some can reach multiple tiles, hurting other enemies in the path.
Besides combat, the game has quite a few puzzles. Most of these involve putting torches in braziers (or removing them), finding hidden buttons, or putting heavy objects on pressure plates, but there are some more difficult puzzles that include portals and opening/closing trap doors on a timer. (sometimes, it's actually best to jump down into a pit trap)
The graphics are nice, but the environments and enemies aren't too varied. The sound is ok -- not memorable, but not super annoying either.
It's a fun game that can take quite a while to finish if you try to find every secret, every treasure, and the best gear. Also, the game is very inexpensive. It is $15 well spent.