The Game Modes
Currently, players can enjoy up to three game modes with their friends:
1.Campaign
You can team up with up to two friends in the campaign missions.
2.PVE
One of my favourite game modes—and here’s why: You can use your own customized Space Marines instead of being restricted to the campaign characters. This lets you and your friends show off your favourite legion and "drip." The mode also supports up to three players.
3.PVP
The only mode where you can play with five friends against six other players—12 in total. Since I’m not great at PVP, I didn’t spend as much time here. But if I had to pick a favourite between TDM, Domination, and King of the Hill, I’d go with King of the Hill. Yes, to the camping life!
*Please note that all game modes except PVP support crossplay! PVP is restricted to players on the same platform due to balancing issues. (Console > Console , PC > PC)