343 Industries has shared a tweet confirming that it is planning to roll out its first beta test for Halo Infinite's highly anticipated Campaign network co-op mode in July.
There better also be split-screen, even on PC. Gears 4 and 5 have split-screen on PC, and Serious Sam 3 did up to I think 4P split-screen on PC years ago. But at minimum there needs to be LAN co-op. Honestly Halo Infinite should not have shipped without some form of co-op.