NNNNNOOOOO!!!!!!!After Fallout, now they did it to XCOM. This is not a sequal, it is nothing more than branding and marketing a completely unrelated game.
Next it will be "Chess II: the fall of the king". Now in first person, because turn based is so 1990. America in the 1950's is recovering from the apocalyptic invasion of the black pieces. A single white pawn takes it upon itself to save the white peo... (sorry, too racist) the other king from an inevitable faith. You will face up to 8 pawns of the black realm, knights, religious freaks with OCD that will only step on a certain color tiles and mobile fortifications. You may advance from pawn to a queen (yuck) and acquire new weapons and abilities such as the deadly two-forward-one-right knight secret move.
Oh come on! enough of this!
In the mean time, the last thing worth playing in the old style is UFO alien invasion. Open source and runs well on linux:
http://ufoai.ninex.info/wiki/index.php/News