XCOM: Chimera Squad
The player takes control of a squad of 11 characters – both humans and aliens – that make up the Chimera squad. Each character has a set of unique abilities that replace the classes from the previous games in the franchise. The game is divided into turn-based tactical battles and the management of the squad’s non-combat activities. These activities form the strategic layer of the game and allow players to change or upgrade their squad members’ equipment and send them out for investigations. The strategic layer also shows the level of unrest in each area of the city, when it goes out of control, the city is engulfed in unrest.
When the player starts a combat mission, he chooses which characters will participate in it. Each mission can have multiple combat segments. The mission begins in the planning phase, which allows the player to place units at designated points from which they will begin combat. Different points give players different bonuses and challenges, and the player has the opportunity to distribute his units across several points at once.
When the battle begins, player-controlled units and computer-controlled opponents move in a mixed order – one player’s unit, then one opponent’s unit. The game calls this system “interleaved turns”. Some agents have the ability to interfere with the order of moves, and once per mission, the player has the ability to make his unit look like the next one, regardless of the order  . This system is very different from previous games in the XCOM series, in which all player-controlled units go first, and then all computer-controlled opponents. During a turn, you can carry out a set of actions similar to previous games – movement, attack, taking up defensive positions and using special abilities. Some abilities form synergies with the abilities of other characters [.
Wounded characters can lose consciousness during the battle, after which another character must stabilize his condition. If the character is not given proper medical attention in time, he will die, the mission will be failed and the player will have to start over. As in previous games in the series, the player has the opportunity to activate the “ironman mode”, which limits the number of available save slots to one and imposes permanent death. The campaign takes about 20 hours to complete.
Like previous games in the series, Chimera Squad has expanded mod support, allowing players to add new characters, missions, and equipment to the game.
Chimera Squad is set in City 31, where humans and aliens live together. The events take place five years after XCOM 2: War of the Chosen, in which the alien-led ADVENT organization was overthrown and represented power on Earth for 20 years after the invasion  . The player controls the Chimera squad, which acts as a peacekeeper in the city and opposes unknown elements trying to destabilize the situation in City-31.
Mayor Nightingale of City-31 was killed in a terrorist attack and the Chimera squad is tasked with finding the culprits. In the course of the investigation, the detachment takes turns confronting three criminal factions: Descendants (from English – “The Progeny”) – the cult of the doomsday, consisting of creatures with psionic abilities; The Gray Phoenix is a street gang made up of aliens who find the earthly community unsuitable for them; and the Sacred Coid, a religious cult made up of former ADVENT soldiers and aliens, preaching salvation for those who opposed XCOM. Over time, “Chimera” learns that behind all three groups is a fourth mysterious faction, codenamed “Atlas”.
Once all three criminal groups are defeated, Atlas launches an attack on the city center of City-31. Detachment “Chimera” rescues assistant mayor Parata, simultaneously fighting off the attackers. They soon learn that by killing Nightingale and supporting the rest of the factions, Atlas is trying to wreak havoc on City 31 with the ultimate goal of taking control of it. The Chimera squad storms the Atlas hideout and defeats their leader. A month later, as Squad Chimera celebrates victory, two people watching their headquarters from a monitor notice that by the time XCOM realizes that a war has begun with a new threat in their face, it will be too late. to stop them.
The chief designer of Chimera Squad was Mark Nauta [who participated in the development of XCOM 2 as a game designer . According to Jake Solomon, Lead Developer for XCOM 2, the Chimera Squad development team included many people from the XCOM 2 team, but he himself was not involved in the project.  Development on Chimera Squad began following the completion of XCOM 2: War of the Chosen.