Project IGI : I'm Going In v1.0

Project I.G.I. (released in North America as Project I.G.I.: I'm Going In) is a tactical first-person shooter video game developed by Innerloop Studios and released in December 2000 by Eidos Interactive. Upon release the game received mixed reviews due to a number of shortcomings including poorly programmed A.I., lack of a mid-game save option, and the lack of multiplayer features. However it was praised for its sound design and graphics, thanks in part to its use of a proprietary game engine that was previously used in Innerloop's Joint Strike Fighter.
Gameplay:

System Requirements

Operating Systems : Windows 95, 98, Millennium Edition, XP, Vista, 7, 8, 8.1, 10
Graphics : DirectX 7.0a compatible graphics card or later
Processor Type : Pentium II or later
Processor Speed : 300 Hz or Better
RAM : 64 MB Minimum

Note :

To properly run on Windows 8, 8.1 & 10, You need to install dgVoodoo tool since it is very old game.
Download dgVoodoo v2.55.4 and install it before running the game.