Windows and Linux
Both operating systems are listed under the same Steam app. That platform availability alone is not proof of an explicitly supported crossplay feature.
Console crossplay
No official console edition was found, and no PC-to-console crossplay announcement was found. This is a current evidence boundary, not a claim about all future plans.
Frequently asked questions
Can Windows and Linux players play together?
The official sources list both Steam builds but do not explicitly label crossplay; verify the current lobby behavior before planning a mixed-OS session.
Does Machine Party have console crossplay?
It cannot be confirmed because no official console version or crossplay announcement is currently listed.