There was one on the PS1 like that . And I played the shit out of it. It's probably not the one you're thinking of, but reading your post reminded me of it. Can't think of the name atm.
Crosmando: Does anyone here remember a 2D Helicopter simulator in a top-down view, the graphics were kinda "Commandos-like" in terms of rendered backgrounds, if you get me, I'm pretty sure you were in a Hind gunship too, and you had a really limited fuel supply that could quickly run out. I believe it was on the PS1, though I'm remembering from ages ago...
Any ideas?
AFnord: Sounds like part of the *strike series. Probably nuclear strike.
*edit* or more likely Soviet Strike
http://www.mobygames.com/game/soviet-strike Though check out the older games. The PS1 and later games had 3d graphics, while Jungle & Desert strike were isometric 2d.
It was something like this. This may be it.