UFO: Afterlight is a great game that you'll find yourself unable to step away from because you have to research one thing more, or expand to one more territory.
Browsing: Reviews by Rob Holland
FoTR is a fairly run of the mill expansion pack that offers few new incentives in terms of missions or units, and it's not something for every WWII RTS gamer to snatch up.
Titan Quest is a game that looks nice, plays well, and has immense opportunities both for replaying, and for making your own worlds.
The bottom line for Sin Episodes: Emergence is that it has some nice features which make it better than an average FPS.