Hello,

Long time ago (at the time of Windows 95) there was a game I used to play and I cannot remember the name

It was a flight simulation but not with real planes, more futuristic. The plane may be triangular
The setting was green hills and the sky above
There were tunnels, made in metal, carved into the hills
And you could shoot

Do you have any idea of the identity of the game?

Thanks
Gilou

No, that is not the game. But thanks

Sure? :)
[url]http://www.mobygames.com/game/windows/fury/screenshots/gameShotId,245681/[/url]
Triangular plane, green hills on the first planet, sky and there's at least one tunnel trip in each mission, sometimes with bossfight down there.
[url]http://www.mobygames.com/game/windows/fury/screenshots/gameShotId,245685/[/url]

That really sounds like terminal velocity. I remember there was a set of levels with a lot of green and times when you were mostly above the clouds.

Check Terminal Velocity too. It's a 1995 release and looks quite similar to Fury http://www.mobygames.com/game/terminal-velocity/screenshots

That was one of the best flying games of the period. It was like Descent, except you could actually fly around. Plus you still had those underground sequences and all those planets to explore.

But, it's really not very fun to play without a proper joystick of some sort. Preferably with a throttle.