4 Player Online Co-Op isn't verified yet.
Co-op Mode comes in two flavors: standard and MP.
Basic Co-Op has players working together through the standard set of single-player levels.
MP Mode - Gives players a whole new set of levels, especially designed for multiplayer gameplay.
This page contains co-op info for N+ on the Xbox Live Arcade. All information about N+ was correct at the time of posting. Information is subject to change. If you see any errors please email us.