how would you guys describe the features of an "xcom" game anyway? is syndicate wars similar to the first xcom?
Strategic view with research and base building + tactical resolution of ground combat (some would probably count tactical air combat).
Most people will cite high combat lethality as a defining factor as even trained veterans can go splat due to high explosives, reaction fire, or get skullfucked by an alien parasite.
Therefore, the thing you do is churn through a steady supply of expendable, green troops, those who survive the first couple of missions become your treasured veterans.
At some point in the game you hit technological parity with the aliens, but if you don't stay on your toes, the game is quick to punish that.
The Firaxis SEXCUM clones (let's use proper notation to stay on the same page) try to ape the original, but ultimately come short in a bunch of ways.
They try to celebrate the "lethality" of original's combat, but do not provide the scale to make it happen (4-6 units is not enough, the original's scale is about 2x).
Another counter productive thing is unlocking tactical abilities through character progression.
Not to mention, a whole bunch of questionable design choices, like aliens getting a free turn and not being active on the map until you "trigger" them.
There are also plenty of tiny details the clones tend to miss. One is ballistics - in the original, a burst at point blank means everything in that cone of fire is in danger,
friend or foe, because that shot needs to land somewhere, making cqb especially brutal.
Another is full environmental destructibility, opening new avenues for approach. If you don't want to risk CQB in a barn, just blow the walls up. If the aliens are eyeballing the main door,
make a new one.
Yet another is the strategic layer, which actually simulates enemies running around and doing stuff. This has effect on gameplay - you can deduce where alien bases are located by analyzing
global sighting reports and if you detect a big alien ship and fail to shoot it down, it is going to execute its mission - establish a base, start a terror site, sway a country to deny your funding.
If you keep shooting UFOs down in an area, they will start running search patterns to find your base, if you discover an alien base, you can leave it be to milk the supply ships for E-115, etc.
This all runs under the hood and not just through random events, and you get to catch a glimpse of the inner workings once you get to decode alien communications.