Plot: Project I.G.I. is a tactical first-person shooter video game developed by Innerloop Studios and released in December 2000 by Eidos Interactive. Wikipedia
Plot: I.G.I.-2: Covert Strike, known in the PAL region as Project I.G.I. 2, is a tactical shooter computer game developed by Innerloop Studios and released by Codemasters in 2003. The game is a stealth-based first person shooter. It is the sequel to Innerloop's Project I.G.I.. Wikipedia