Awhile ago Firaxis announced they were making an Xcom remake. No. Not the one set in the 50's where you play a bunch of FBI guys. This is a more legit remake centered around turn based combat and commanding a paramilitary organization on a strategic geoscape. It's a bit late, but there's no time like the present to start a thread.
Gameinformer exclusive coverage.
Two good articles go over the combat in the game.
-Advanced Tactics: Part 1
-Advanced Tactics: Part 2
General details
-Revamped turn based system: Time Unites are out. Players now have a free movement radius, and an *action point*. This can be used to shoot, perform an action, or move further. Certain weapons (sniper rifle) require no movement to be used
-Special abilities: All soldiers start as rookies, but with XP they can gain experiance and level up to have certain abilities. Like Snipers being able to snipe on the move, and heavy weapon soldiers gaining extra suppression abilities.
-Smaller scale: You have one base, and the number of soldiers at the start of the game in mission seems to only be 4. Larger teams can be used later, but it's not known how large, and you can buy satellite coverage to detect UFO's
-More nuanced interactions with member nations. Will be given missions/tasks to improve relations with them. Example given was providing Japan with laser rifles in exchange for engineers.