Terracide

Terracide is a fun 3D action game in the same style as Descent, although admittedly not as good. This was reflected in many reviews at the time.

A colony of ex-humans, having left Earth generations ago, are returning in gigantic dropships to destroy their former home world. Mutated by the harsh climates of their adopted planets, they have little in common with their human ancestors - and no problem blowing them away.

Terracide was one of the first PC titles to support the advanced features of 3D graphics cards. The gameplay is very similar to the Descent series.