Hands down my favorite game of this genre and era. The graphics engine is interesting, as it looks completely different from anything else of its time, but I thought that this game was simply stunning in its beauty and level design. Even then, the engine looked to be about one gen older, but the designers and artists somehow made it work, and I would not want to play it using any other engine, because this one fits it perfectly.
You and your team are sent out to do missions, and you control each member of your team. This system overall works pretty well, and the odd glitch here and there only makes it more endearing. I loved this game, and would pay a good amount to be able to play it again. If my PC had an optical drive, I would try to make it work.