For anyone who enjoyed Descent, please go buy Overload. It's a pretty much perfect spiritual sequel, with a great soundtrack.
And I believe made by some of the people that formerly worked on Descent.
That is true, furthermore Overload has an usermade campaign called Overload: First Strike, which is a conversion and upgrade of the entire Descent 1 campaign to Overload. Additionally I recommend Desecrators, which is a Descent-like with procedurally generated maps. Think Sublevel Zero or Everspace, except good.