Infiltrate. Asassinate. Duplicate. Loads of non-stop fun.
You play as a red armoured elite killer, who's out to extract some revenge. You get a wide variety of weapons to go up against a plethora of enemies. This was also the first game I can remember playing where you could see visible damage on everything you shot. You also came with a variety of moves, which was impressive for the time. Strafing, crouching, jumping, running and rolling in all directions. You felt in control of the character.
The details environments and 3D characters looked great, and the live action footage for the cut scenes were done quite well, considering some of the horrible acting that's gone on with these type of cut scenes in the past.
The game is challenging, and the action stills holds up today!