Sent to a fort in search of a mystical orb, you will kill all that moves while descending levels towards the lower depths of the dungeon. All of it seen in first person through the graphical engine of the Eye of the Beholder trilogy.
But this time you won't have an adventure, this is just a hack & slash, but with the good point; that is having a dungeon customization system. When you start playing, the depth of the dungeon, the quantity of loot, monsters or food, how quickly you get hungry, how many traps you will find, if you will find level sucking undeads and more options can be modified, and that, with the addition of randomly generated dungeons, gives a good deal of playing time.
For the gameplay it uses the Advanced Dungeons & Dragons rules. So the character development is based on levels that raise as you earn experience, mainly from killing enemies, to make your character, chosen from a mix of stereotypical professions and races, stronger and more deadly.
You can be a melee fighting warrior or a lockingpicking thief, or, if you prefer using magic, a defense and support oriented cleric or a more offensive mage. Also you can chose a multiclass one, which mixes two or three of them at the expenses of slowing the level raise, a sacrifice that may be worth as you can only have one character.
One of the main problems in the game is that the interaction you have with the dungeon doesn't have depth. You can pick locks, if you are a thief; spot illusionary walls, or climb up from pits, or if you have luck you may find some magic orbs that heal when payed. But your problems won't ever go beyond having to find a key, or an object, to open a door, and your special findings will be, if lucky, just a new object to use. And so it happens with the diversity of classes. They mainly give you different ways of killing or avoid getting killed, even though there are a few interesting spells like 'breath water', or 'detect magic'; or some special skills, like the magical instruments only usable by bards.
In the end, it is a fun game to play once in a while to try a new dungeon or finish the one you are in, or just to kill senselessly with your character... It would be good if there were the possibility of keeping your character after finishing a dungeon, as it is likely that you won't find all the mage scrolls, or a complete set of magical armor and/or weapon to receive the bonus they grant.