Enlisted will allow cross-play between 3 platforms

Enlisted
Official Website: Link
Supported game modes:
  • Multiplayer
  • Massively Multiplayer Online (MMO)
Supported player perspectives:
  • First person
  • Third person
Crossplay platforms:
Enlisted will support cross-play across multiple platforms. It will be possible to play together with your friends on Playstation 5, XBox Series S/X and Windows PC. Please check out all the details on the game's official website!
Cross-Platform Combination Details:
Source: Link
Additional Info: Enlisted does support cross-play for now. However, according to their forums, players can match up with others irrespective of the platform they're on, but they can't add them as friends. Since the game is in open beta, more changes are scheduled to come once it goes live after the beta testing has ended.
Summary:
Enlisted is a squad-based first person MMO shooter covering key battles from World War II. The game carefully recreates weapons, military vehicles and the atmosphere of that era, while demonstrating really massive clashes of numerous soldiers, tanks and aircraft with artillery and naval support. Most of the Enlisted game modes simulate a battle involving several infantry platoons and gives the player control over a squad of soldiers with various roles (i.e. submachine gun soldier, sniper, radio operator, rifleman and others), a whole military vehicle crew or an aircraft pilot. One of the fighters is controlled directly, while others move and shoot independently following the player's general orders. In a situation where all the soldiers in the squad have fallen, a player respawns with the next available squad. This decision makes Enlisted battles look massive and spectacular while keeping the input of each individual player in the overall team victory quite significant. Enlisted is developed by Darkflow Software studio using Dagor engine - the same engine that is used by Gaijin Entertainment’s War Thunder military online action game. That’s why the accurately recreated ground vehicles and aircraft look, move and are controlled in the most realistic way and their damage model is quite sophisticated. For example, when a shell breaks through a tank armor, the trajectory of individual shards is properly calculated as well as the exact consequences to each vehicle part and crew member. Features: – Epic massive battles that look as massive as the historical battles, like the Omaha beach landing. – High input of each player in the team victory: Despite the massiveness of the battles, the result is significantly defined by the performance of each player. – The diversity of game roles and the ability to switch between them on the fly: one minute you’re storming enemy trenches with a submachine gun, the next, you’re hiding on a roof with a sniper rifle, and you can also jump into a tank to break through the defenses, throw grenades towards the enemy vehicle or provide air support to your teammates. – Enlisted looks authentic even in the tiniest details, like the appearance of soldiers and buildings or a tank’s damage model. The list of vehicles and weapons available in specific missions is also based on real history, so you cannot use equipment from 1945 in a battle that took place in 1941.
 – A player can customize and train squads according to their individual playing style, unlock perks and upgrades as long as this does not contradict the historical accuracy principle.
Screenshots:
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Supported game modes:
  • Multiplayer
  • Massively Multiplayer Online (MMO)
Supported player perspectives:
  • First person
  • Third person