Borderlands 2 is not cross platform.

Yes, both Xbox One and PlayStation 4 can play together on PS4. However, some games may not be compatible due to the differences in the hardware.

Yes, you can play PS4 and Xbox One together. However, you will need to have the same version of the game and the same region code in order to play together.

No, Borderlands 2 is not cross-platform between Xbox 360 and Xbox One.

Borderlands 2 is not cross-platform between PC and Xbox.

Borderlands 3 is not cross platform.

No, Borderlands 3 is not cross platform between PS4 and Xbox 2020.

Yes, Borderlands 3 does have crossplay.

Yes, PlayStation 4 can add Xbox friends. However, there are some limitations to this feature. First, PlayStation 4 only allows you to add friends who are also PS4 users. Second, you cannot see or chat with your Xbox friends if you’re not signed in to your account on both systems.

Yes, PS4 does have Crossplay. This means that you can play with people on other platforms, like PC and Xbox One.