XCOM 2

In XCOM 2, the player-character is the commander of the XCOM military organization that is now reduced to a resistance force opposing the ongoing alien occupation of Earth. Played from a top-down perspective, the game uses turn-based tactics in which players issue commands to a squad of human soldiers to eliminate the aliens in a map and dependent on missions, complete secondary objectives. Many of the missions are timed, requiring players to complete it within several turns. Maps are procedurally generated to create a wide variety of levels. Every map features different terrain and buildings in each playthrough. The game offers four difficulty settings: Rookie, Veteran, Commander and Legend.

After players complete the campaign, they can start a new game with the "Ironman" mode enabled. In this mode, the player's save file is overwritten whenever the player performs an action, making it impossible for players to import an earlier save after making a poor decision. Players can create campaigns, cosmetics and enemy types, which can be shared through Steam Workshop. The game features a one-on-one multiplayer mode in which players received a fixed number of points to build a squad composed of both ADVENT and XCOM forces, and attempt to eliminate the opponent's squad on a battlefield.

At the start of most missions, the player's squad is concealed and will not be detected by enemies unless they attack or move to a nearby position. This allows players to ambush enemies, which provides combat bonuses. Fog of war hides the aliens and their actions from view until the player's soldiers are in range and have line of sight on them. Squad members can take cover behind objects which reduces the chance of being hit. Enemies will attempt to flank and exposed soldiers will sustain heavy injuries from attacks due to the lack of any defense. Each squad member can perform a limited number of actions before the enemy takes their turn and players can choose to end their turn early. Soldiers can be instructed to move, attack or both depending on their available action points. The game will inform the players of the possibility of landing a successful shot and the amount of health the enemy will lose. They can reload, remain in overwatch to shoot any moving enemy in their line of sight, hunker down, and hack into enemies' mechanical weapons such as turrets and temporarily shut them down or take control of them.

Players take control of the Avenger, an alien ship that is the new mobile base for XCOM, commanding the engineering and research departments of the base between missions. Players can assign the research department to perform autopsies on alien corpses and study the technology found during missions, which unlock new gadgets, weapons and technologies to assist players in battle. The engineering department can be instructed to craft new ammo types, armors, and weapons. The Armory allows players to recruit soldiers and customize their personalities, names, costumes, genders, nationalities, and weapons. Wounded soldiers will slowly convalesce at the base. As the game progresses, new facilities that allow players to increase squad size, improve combat performance, and craft experimental weapons are unlocked. Players also need to build Resistance Comms to establish contact with resistance cells worldwide, allowing players to expand to new territories and maintain their influence. Facilities must be staffed with engineers to ensure they are fully functional. These facilities can be upgraded.