The Riftbreaker will not feature multiplayer until the game is released - the development focus is on the single player content until then.
After the game is released, the game will get multiplayer support.
As the multiplayer is not in development just yet, do the developers themselves not know how the multiplayer mode will look like.
Multiplayer Features
Following things are currently known (Subject to change due to development !)
- Co-op mode only, no PvP
- No anti-cheat planned as it's only Co-op
- Online multiplayer