Ok, I played this game sometime in the nineties and I can't remember the name, so I'll try to explain it in as best detail as I can remember.
As far as I can remember, I believe the game was in a more modern time. The game worked almost liked the battles in Fallout. The playfield was displayed in the same isometric view and you worked in a turn-based fashion through each level (moving so many grid spots per turn. If I remember correctly some missions took stealth as well.
Sorry I don't have a whole lot of info, if I remember anything else I'll add it. If you might have an idea, screen shots would really help as well, not sure I'll remember it from just seeing the name.

Hm, it reminds me x-com.
Here are some screenshots, see if it's the same game you are looking for:
http://mars.sourceforge.net/img/ufo.jpg
http://www.fragtopia.com/articles/uf...m-screenie.gif

Jagged Alliance?

Laser Squad? Breach series? SAS Combat?, What was that WWII from SSI in mid 90s like that? Can't remember the name, I have it but I have no idea where.

Septerra Core plays like Fallout

Check it

S.C does not have turn based system, thus it does not play like Fallout.
Plus S.C is not an old game. :crazy:

Turn based as in u play then someone else plays....everyone has his turn.

edit : anyway i was taling about the atmosphere of the game i found alot of similarities. Worth a guess i think

It's too bad Septerra Core isn't abandonware. I used to have it, but I didn't play it cause my computer didn't ahve sound then. Then I re-found it, but it was too badly scratched.

Nope, none of those. Though I do like SC a lot and wish it would become abandonware... >_>
I think this game had a lot of the color red too, it was kinda like a theme of it.

Shadow watch?

http://www.mobygames.com/game/windows/shadow-watch