The Descent series is one of the greatest in gaming history, none before or since have ever managed to pull off an all directions anti gravity game such as this one.
You will get lost, you will go fast and you will love it. Its the ultimate form of Vertigo.
With fast paced action, a myriad of power'ups and more monsters to your hearts content. You will never tire of this game.
The later stages are however exceedingly difficult and you may need to practice quite a bit.
This is a must have in any true gamers collection, and at the same time, ensure you get Descent I & II and play those thoroughly.