If you like games you will willingly and happily give this game 40 hours of your life or more...
This game start off by having you choose your character type between a warrior, mage or rogue. All three classes play very differently with the warrior being the melee fighter, the mage usic his magic spells and staves and the rogue using mostly long range weapons. The game starts off with you arriving in the town of Tristram where only a handful of residents are left. The town has been decimated by war, an insane king, and the general sense of horror that permeates through the entire town.
The game has a quest system where residents in town will give you quests to perform in the labyrinths under the church. These quests usually consists or retrieving an item, killing a certain creature or clearing a certain area. There are 16 randomly generated levels in the game divided into 4 environments: The labyrinth, the catacombs, the caves, and hell itself. Along these levels you will be confronted by all types of nasty creatures from goblin-looking defilers to magma demons to death knights.
The interface and inventory system are as intuitive as can be. You have slots in you inventory where you can store items or drag them onto your paper-doll to equip them on your character. The interface leaves a bar at the bottom of your screen when your playing instead of at the top which actually make it feel like you have a better view of the battle. This bar shows you your health and mana using two orbs filled with liquid. These get more and more empty as you take damage or use magic. The bar also has 8 slots to carry critical items such as potions or scroll for easy use.
Just as the interface is simple the controls are as well. You left click where you want the character to go and he will instantly move there. Left-click and enemy and your character will attack it using his equipped weapon. Left-click on an NPC or object to interact with it. Right-clicking uses your equipped spell. Your selected spell shows up as an icon at the right of this bar at the bottom. Clicking this icon brings up the list of spells you have learned and then clicking on the spell you want will equip it. You can also setup quick spells using the F1-4 keys.
Graphics in this game are sharp and clear. Equipping your equipment will show up on your character while walking around to a limited extent (all armors or weapons within a same class will show up the same).
Sounds in the game are good. Voice acting is top-notch (just as you would expect from blizzard...but remember this game help set that reputation.) Creatures all have ditinct sounds and some even have dialogue. The only bad thing about diablo regarding sound is that throughout the entire game there is no music, only ambient sounds. This is with the exeption of course of the music in town. (this little guitar tune does get on your nerves after a while but does help give the town a feeling of despair.)
In conclusion, you should own Diablo. That or stop breathing.