I am looking for a '90s first-person shooter game, where you were inside some futuristic combat vehicle driving on a battlefield. Your armaments included twin machine guns, a flamethrower and some missiles. Graphically, it reminds me a well known game, Descent, except here you were not flying and there was an open sky.
I remember one level where there is a large trench you could drive into, and your enemies included turrets launching missiles or grenades, and mechanical "spiders" launching red fireballs. There was a second segment of this area, that was made of a network of water canals and islands.
I played this game more than 20 years ago on Windows 95 or 98 and I think (but am not certain) that the name of the game started with 'B.'