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. Īfter 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. Īt 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.